Home / 10,081.20-15,121.80-8,453.10

Finding the Fourth Proportional to 10,081.20, 15,121.80 and 8,453.10

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Solution

The fourth proportional to 10,081.20, 15,121.80 and 8,453.10 is: 12,679.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.20 : 15,121.80 = 8,453.10 : x
  2. Step 2: Convert to fraction form
    10,081.20/15,121.80 = 8,453.10/x
  3. Step 3: Cross multiply
    10,081.20x = 15,121.80 × 8,453.10
  4. Step 4: Simplify right side
    10,081.20x = 127,826,087.58
  5. Step 5: Solve for x
    x = 127,826,087.58/10,081.20
  6. Step 6: Final answer
    x = 12,679.65

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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.