Home / 20,556,898,715.94-28,377,815,589.64-12,947,128,274.76

Finding the Fourth Proportional to 20,556,898,715.94, 28,377,815,589.64 and 12,947,128,274.76

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Solution

The fourth proportional to 20,556,898,715.94, 28,377,815,589.64 and 12,947,128,274.76 is: 17,872,891,415.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556,898,715.94 : 28,377,815,589.64 = 12,947,128,274.76 : x
  2. Step 2: Convert to fraction form
    20,556,898,715.94/28,377,815,589.64 = 12,947,128,274.76/x
  3. Step 3: Cross multiply
    20,556,898,715.94x = 28,377,815,589.64 × 12,947,128,274.76
  4. Step 4: Simplify right side
    20,556,898,715.94x = 367,411,218,596,553,162,752
  5. Step 5: Solve for x
    x = 367,411,218,596,553,162,752/20,556,898,715.94
  6. Step 6: Final answer
    x = 17,872,891,415.85

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.