Home / 20,556,898,712.69-28,377,815,585.15-12,947,128,271.51

Finding the Fourth Proportional to 20,556,898,712.69, 28,377,815,585.15 and 12,947,128,271.51

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Solution

The fourth proportional to 20,556,898,712.69, 28,377,815,585.15 and 12,947,128,271.51 is: 17,872,891,411.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556,898,712.69 : 28,377,815,585.15 = 12,947,128,271.51 : x
  2. Step 2: Convert to fraction form
    20,556,898,712.69/28,377,815,585.15 = 12,947,128,271.51/x
  3. Step 3: Cross multiply
    20,556,898,712.69x = 28,377,815,585.15 × 12,947,128,271.51
  4. Step 4: Simplify right side
    20,556,898,712.69x = 367,411,218,446,089,584,640
  5. Step 5: Solve for x
    x = 367,411,218,446,089,584,640/20,556,898,712.69
  6. Step 6: Final answer
    x = 17,872,891,411.36

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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.