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Finding the Fourth Proportional to 8,656.20, 12,025.80 and 8,575.20

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Solution

The fourth proportional to 8,656.20, 12,025.80 and 8,575.20 is: 11,913.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.20 : 12,025.80 = 8,575.20 : x
  2. Step 2: Convert to fraction form
    8,656.20/12,025.80 = 8,575.20/x
  3. Step 3: Cross multiply
    8,656.20x = 12,025.80 × 8,575.20
  4. Step 4: Simplify right side
    8,656.20x = 103,123,640.16
  5. Step 5: Solve for x
    x = 103,123,640.16/8,656.20
  6. Step 6: Final answer
    x = 11,913.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.