Home / 12,260.28-18,390.78-8,126.76

Finding the Fourth Proportional to 12,260.28, 18,390.78 and 8,126.76

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Solution

The fourth proportional to 12,260.28, 18,390.78 and 8,126.76 is: 12,190.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,260.28 : 18,390.78 = 8,126.76 : x
  2. Step 2: Convert to fraction form
    12,260.28/18,390.78 = 8,126.76/x
  3. Step 3: Cross multiply
    12,260.28x = 18,390.78 × 8,126.76
  4. Step 4: Simplify right side
    12,260.28x = 149,457,455.27
  5. Step 5: Solve for x
    x = 149,457,455.27/12,260.28
  6. Step 6: Final answer
    x = 12,190.38

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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.