Home / 20,981,312.02-28,955,104.16-11,688,876.82

Finding the Fourth Proportional to 20,981,312.02, 28,955,104.16 and 11,688,876.82

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Solution

The fourth proportional to 20,981,312.02, 28,955,104.16 and 11,688,876.82 is: 16,131,147.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981,312.02 : 28,955,104.16 = 11,688,876.82 : x
  2. Step 2: Convert to fraction form
    20,981,312.02/28,955,104.16 = 11,688,876.82/x
  3. Step 3: Cross multiply
    20,981,312.02x = 28,955,104.16 × 11,688,876.82
  4. Step 4: Simplify right side
    20,981,312.02x = 338,452,645,778,065.19
  5. Step 5: Solve for x
    x = 338,452,645,778,065.19/20,981,312.02
  6. Step 6: Final answer
    x = 16,131,147.83

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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.