Home / 8,487.72-12,738.96-4,542.12

Finding the Fourth Proportional to 8,487.72, 12,738.96 and 4,542.12

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Solution

The fourth proportional to 8,487.72, 12,738.96 and 4,542.12 is: 6,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.72 : 12,738.96 = 4,542.12 : x
  2. Step 2: Convert to fraction form
    8,487.72/12,738.96 = 4,542.12/x
  3. Step 3: Cross multiply
    8,487.72x = 12,738.96 × 4,542.12
  4. Step 4: Simplify right side
    8,487.72x = 57,861,885.00
  5. Step 5: Solve for x
    x = 57,861,885.00/8,487.72
  6. Step 6: Final answer
    x = 6,817.13

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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.