Home / 20,921,338.43-28,879,278.80-15,709,402.74

Finding the Fourth Proportional to 20,921,338.43, 28,879,278.80 and 15,709,402.74

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Solution

The fourth proportional to 20,921,338.43, 28,879,278.80 and 15,709,402.74 is: 21,684,856.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921,338.43 : 28,879,278.80 = 15,709,402.74 : x
  2. Step 2: Convert to fraction form
    20,921,338.43/28,879,278.80 = 15,709,402.74/x
  3. Step 3: Cross multiply
    20,921,338.43x = 28,879,278.80 × 15,709,402.74
  4. Step 4: Simplify right side
    20,921,338.43x = 453,676,221,431,396.94
  5. Step 5: Solve for x
    x = 453,676,221,431,396.94/20,921,338.43
  6. Step 6: Final answer
    x = 21,684,856.50

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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.