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Finding the Fourth Proportional to 40,328.71, 60,505.37 and 20,621.11

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Solution

The fourth proportional to 40,328.71, 60,505.37 and 20,621.11 is: 30,937.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,328.71 : 60,505.37 = 20,621.11 : x
  2. Step 2: Convert to fraction form
    40,328.71/60,505.37 = 20,621.11/x
  3. Step 3: Cross multiply
    40,328.71x = 60,505.37 × 20,621.11
  4. Step 4: Simplify right side
    40,328.71x = 1,247,687,484.73
  5. Step 5: Solve for x
    x = 1,247,687,484.73/40,328.71
  6. Step 6: Final answer
    x = 30,937.95

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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.