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Finding the Fourth Proportional to 18,707,059.32, 25,817,920.02 and 15,561,766.68

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Solution

The fourth proportional to 18,707,059.32, 25,817,920.02 and 15,561,766.68 is: 21,477,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707,059.32 : 25,817,920.02 = 15,561,766.68 : x
  2. Step 2: Convert to fraction form
    18,707,059.32/25,817,920.02 = 15,561,766.68/x
  3. Step 3: Cross multiply
    18,707,059.32x = 25,817,920.02 × 15,561,766.68
  4. Step 4: Simplify right side
    18,707,059.32x = 401,772,447,514,140.94
  5. Step 5: Solve for x
    x = 401,772,447,514,140.94/18,707,059.32
  6. Step 6: Final answer
    x = 21,477,049.95

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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.