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Finding the Fourth Proportional to 8,658.16, 12,987.24 and 5,582.32

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Solution

The fourth proportional to 8,658.16, 12,987.24 and 5,582.32 is: 8,373.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.16 : 12,987.24 = 5,582.32 : x
  2. Step 2: Convert to fraction form
    8,658.16/12,987.24 = 5,582.32/x
  3. Step 3: Cross multiply
    8,658.16x = 12,987.24 × 5,582.32
  4. Step 4: Simplify right side
    8,658.16x = 72,498,929.60
  5. Step 5: Solve for x
    x = 72,498,929.60/8,658.16
  6. Step 6: Final answer
    x = 8,373.48

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Similar ratio
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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.