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Finding the Fourth Proportional to 40,489.35, 60,715.80 and 18,291.30

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Solution

The fourth proportional to 40,489.35, 60,715.80 and 18,291.30 is: 27,428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,489.35 : 60,715.80 = 18,291.30 : x
  2. Step 2: Convert to fraction form
    40,489.35/60,715.80 = 18,291.30/x
  3. Step 3: Cross multiply
    40,489.35x = 60,715.80 × 18,291.30
  4. Step 4: Simplify right side
    40,489.35x = 1,110,570,912.54
  5. Step 5: Solve for x
    x = 1,110,570,912.54/40,489.35
  6. Step 6: Final answer
    x = 27,428.72

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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.