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Finding the Fourth Proportional to 8,614.30, 12,909.15 and 4,908.70

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Solution

The fourth proportional to 8,614.30, 12,909.15 and 4,908.70 is: 7,356.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,614.30 : 12,909.15 = 4,908.70 : x
  2. Step 2: Convert to fraction form
    8,614.30/12,909.15 = 4,908.70/x
  3. Step 3: Cross multiply
    8,614.30x = 12,909.15 × 4,908.70
  4. Step 4: Simplify right side
    8,614.30x = 63,367,144.61
  5. Step 5: Solve for x
    x = 63,367,144.61/8,614.30
  6. Step 6: Final answer
    x = 7,356.04

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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.