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Finding the Fourth Proportional to 18,640,411.25, 25,710,516.92 and 12,442,332.96

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Solution

The fourth proportional to 18,640,411.25, 25,710,516.92 and 12,442,332.96 is: 17,161,574.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640,411.25 : 25,710,516.92 = 12,442,332.96 : x
  2. Step 2: Convert to fraction form
    18,640,411.25/25,710,516.92 = 12,442,332.96/x
  3. Step 3: Cross multiply
    18,640,411.25x = 25,710,516.92 × 12,442,332.96
  4. Step 4: Simplify right side
    18,640,411.25x = 319,898,812,123,459.50
  5. Step 5: Solve for x
    x = 319,898,812,123,459.50/18,640,411.25
  6. Step 6: Final answer
    x = 17,161,574.81

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1.5x scale

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.