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Finding the Fourth Proportional to 28,391,275.59, 39,179,978.69 and 15,338,526.95

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Solution

The fourth proportional to 28,391,275.59, 39,179,978.69 and 15,338,526.95 is: 21,167,177.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,391,275.59 : 39,179,978.69 = 15,338,526.95 : x
  2. Step 2: Convert to fraction form
    28,391,275.59/39,179,978.69 = 15,338,526.95/x
  3. Step 3: Cross multiply
    28,391,275.59x = 39,179,978.69 × 15,338,526.95
  4. Step 4: Simplify right side
    28,391,275.59x = 600,963,158,764,398.25
  5. Step 5: Solve for x
    x = 600,963,158,764,398.25/28,391,275.59
  6. Step 6: Final answer
    x = 21,167,177.11

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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.