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Finding the Fourth Proportional to 40,955.59, 61,396.84 and 15,989.86

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Solution

The fourth proportional to 40,955.59, 61,396.84 and 15,989.86 is: 23,970.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,955.59 : 61,396.84 = 15,989.86 : x
  2. Step 2: Convert to fraction form
    40,955.59/61,396.84 = 15,989.86/x
  3. Step 3: Cross multiply
    40,955.59x = 61,396.84 × 15,989.86
  4. Step 4: Simplify right side
    40,955.59x = 981,726,876.04
  5. Step 5: Solve for x
    x = 981,726,876.04/40,955.59
  6. Step 6: Final answer
    x = 23,970.52

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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.