Home / 8,410.20-12,615.30-5,645.40

Finding the Fourth Proportional to 8,410.20, 12,615.30 and 5,645.40

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Solution

The fourth proportional to 8,410.20, 12,615.30 and 5,645.40 is: 8,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,410.20 : 12,615.30 = 5,645.40 : x
  2. Step 2: Convert to fraction form
    8,410.20/12,615.30 = 5,645.40/x
  3. Step 3: Cross multiply
    8,410.20x = 12,615.30 × 5,645.40
  4. Step 4: Simplify right side
    8,410.20x = 71,218,414.62
  5. Step 5: Solve for x
    x = 71,218,414.62/8,410.20
  6. Step 6: Final answer
    x = 8,468.10

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Half scale
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Double scale
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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.