Home / 12,543.80-18,815.67-3,778.70

Finding the Fourth Proportional to 12,543.80, 18,815.67 and 3,778.70

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Solution

The fourth proportional to 12,543.80, 18,815.67 and 3,778.70 is: 5,668.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.80 : 18,815.67 = 3,778.70 : x
  2. Step 2: Convert to fraction form
    12,543.80/18,815.67 = 3,778.70/x
  3. Step 3: Cross multiply
    12,543.80x = 18,815.67 × 3,778.70
  4. Step 4: Simplify right side
    12,543.80x = 71,098,678.15
  5. Step 5: Solve for x
    x = 71,098,678.15/12,543.80
  6. Step 6: Final answer
    x = 5,668.04

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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.