Home / 12,245.28-18,368.28-8,111.76

Finding the Fourth Proportional to 12,245.28, 18,368.28 and 8,111.76

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Solution

The fourth proportional to 12,245.28, 18,368.28 and 8,111.76 is: 12,167.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,245.28 : 18,368.28 = 8,111.76 : x
  2. Step 2: Convert to fraction form
    12,245.28/18,368.28 = 8,111.76/x
  3. Step 3: Cross multiply
    12,245.28x = 18,368.28 × 8,111.76
  4. Step 4: Simplify right side
    12,245.28x = 148,999,078.97
  5. Step 5: Solve for x
    x = 148,999,078.97/12,245.28
  6. Step 6: Final answer
    x = 12,167.88

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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.