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Finding the Fourth Proportional to 40,113.71, 55,354.71 and 21,960.92

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Solution

The fourth proportional to 40,113.71, 55,354.71 and 21,960.92 is: 30,304.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,113.71 : 55,354.71 = 21,960.92 : x
  2. Step 2: Convert to fraction form
    40,113.71/55,354.71 = 21,960.92/x
  3. Step 3: Cross multiply
    40,113.71x = 55,354.71 × 21,960.92
  4. Step 4: Simplify right side
    40,113.71x = 1,215,640,357.93
  5. Step 5: Solve for x
    x = 1,215,640,357.93/40,113.71
  6. Step 6: Final answer
    x = 30,304.86

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Double scale
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Similar ratio
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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.