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Finding the Fourth Proportional to 8,658.52, 12,991.62 and 8,631.64

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Solution

The fourth proportional to 8,658.52, 12,991.62 and 8,631.64 is: 12,951.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.52 : 12,991.62 = 8,631.64 : x
  2. Step 2: Convert to fraction form
    8,658.52/12,991.62 = 8,631.64/x
  3. Step 3: Cross multiply
    8,658.52x = 12,991.62 × 8,631.64
  4. Step 4: Simplify right side
    8,658.52x = 112,138,986.86
  5. Step 5: Solve for x
    x = 112,138,986.86/8,658.52
  6. Step 6: Final answer
    x = 12,951.29

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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.