Home / 18,760.13-28,140.18-7,520.55

Finding the Fourth Proportional to 18,760.13, 28,140.18 and 7,520.55

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Solution

The fourth proportional to 18,760.13, 28,140.18 and 7,520.55 is: 11,280.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.13 : 28,140.18 = 7,520.55 : x
  2. Step 2: Convert to fraction form
    18,760.13/28,140.18 = 7,520.55/x
  3. Step 3: Cross multiply
    18,760.13x = 28,140.18 × 7,520.55
  4. Step 4: Simplify right side
    18,760.13x = 211,629,630.70
  5. Step 5: Solve for x
    x = 211,629,630.70/18,760.13
  6. Step 6: Final answer
    x = 11,280.82

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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.