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Finding the Fourth Proportional to 40,663.68, 60,960.42 and 15,721.20

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Solution

The fourth proportional to 40,663.68, 60,960.42 and 15,721.20 is: 23,568.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,663.68 : 60,960.42 = 15,721.20 : x
  2. Step 2: Convert to fraction form
    40,663.68/60,960.42 = 15,721.20/x
  3. Step 3: Cross multiply
    40,663.68x = 60,960.42 × 15,721.20
  4. Step 4: Simplify right side
    40,663.68x = 958,370,954.90
  5. Step 5: Solve for x
    x = 958,370,954.90/40,663.68
  6. Step 6: Final answer
    x = 23,568.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.