Home / 12,685.89-17,500.58-8,439.03

Finding the Fourth Proportional to 12,685.89, 17,500.58 and 8,439.03

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Solution

The fourth proportional to 12,685.89, 17,500.58 and 8,439.03 is: 11,641.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.89 : 17,500.58 = 8,439.03 : x
  2. Step 2: Convert to fraction form
    12,685.89/17,500.58 = 8,439.03/x
  3. Step 3: Cross multiply
    12,685.89x = 17,500.58 × 8,439.03
  4. Step 4: Simplify right side
    12,685.89x = 147,687,877.44
  5. Step 5: Solve for x
    x = 147,687,877.44/12,685.89
  6. Step 6: Final answer
    x = 11,641.90

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.