Home / 10,617.20-15,906.60-8,658.80

Finding the Fourth Proportional to 10,617.20, 15,906.60 and 8,658.80

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Solution

The fourth proportional to 10,617.20, 15,906.60 and 8,658.80 is: 12,972.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,617.20 : 15,906.60 = 8,658.80 : x
  2. Step 2: Convert to fraction form
    10,617.20/15,906.60 = 8,658.80/x
  3. Step 3: Cross multiply
    10,617.20x = 15,906.60 × 8,658.80
  4. Step 4: Simplify right side
    10,617.20x = 137,732,068.08
  5. Step 5: Solve for x
    x = 137,732,068.08/10,617.20
  6. Step 6: Final answer
    x = 12,972.54

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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.