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Finding the Fourth Proportional to 18,448.71, 25,456.95 and 11,640.15

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Solution

The fourth proportional to 18,448.71, 25,456.95 and 11,640.15 is: 16,061.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,448.71 : 25,456.95 = 11,640.15 : x
  2. Step 2: Convert to fraction form
    18,448.71/25,456.95 = 11,640.15/x
  3. Step 3: Cross multiply
    18,448.71x = 25,456.95 × 11,640.15
  4. Step 4: Simplify right side
    18,448.71x = 296,322,716.54
  5. Step 5: Solve for x
    x = 296,322,716.54/18,448.71
  6. Step 6: Final answer
    x = 16,061.97

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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.