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Finding the Fourth Proportional to 8,468.80, 12,678.24 and 6,287.20

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Solution

The fourth proportional to 8,468.80, 12,678.24 and 6,287.20 is: 9,412.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,468.80 : 12,678.24 = 6,287.20 : x
  2. Step 2: Convert to fraction form
    8,468.80/12,678.24 = 6,287.20/x
  3. Step 3: Cross multiply
    8,468.80x = 12,678.24 × 6,287.20
  4. Step 4: Simplify right side
    8,468.80x = 79,710,630.53
  5. Step 5: Solve for x
    x = 79,710,630.53/8,468.80
  6. Step 6: Final answer
    x = 9,412.27

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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.