Home / 12,452.40-18,678.60-8,515.80

Finding the Fourth Proportional to 12,452.40, 18,678.60 and 8,515.80

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Solution

The fourth proportional to 12,452.40, 18,678.60 and 8,515.80 is: 12,773.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,452.40 : 18,678.60 = 8,515.80 : x
  2. Step 2: Convert to fraction form
    12,452.40/18,678.60 = 8,515.80/x
  3. Step 3: Cross multiply
    12,452.40x = 18,678.60 × 8,515.80
  4. Step 4: Simplify right side
    12,452.40x = 159,063,221.88
  5. Step 5: Solve for x
    x = 159,063,221.88/12,452.40
  6. Step 6: Final answer
    x = 12,773.70

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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.