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Finding the Fourth Proportional to 40,500.34, 60,750.87 and 12,420.53

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Solution

The fourth proportional to 40,500.34, 60,750.87 and 12,420.53 is: 18,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,500.34 : 60,750.87 = 12,420.53 : x
  2. Step 2: Convert to fraction form
    40,500.34/60,750.87 = 12,420.53/x
  3. Step 3: Cross multiply
    40,500.34x = 60,750.87 × 12,420.53
  4. Step 4: Simplify right side
    40,500.34x = 754,557,882.75
  5. Step 5: Solve for x
    x = 754,557,882.75/40,500.34
  6. Step 6: Final answer
    x = 18,630.90

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1.5x scale

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.