Home / 8,112.38-11,197.35-5,428.76

Finding the Fourth Proportional to 8,112.38, 11,197.35 and 5,428.76

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Solution

The fourth proportional to 8,112.38, 11,197.35 and 5,428.76 is: 7,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.38 : 11,197.35 = 5,428.76 : x
  2. Step 2: Convert to fraction form
    8,112.38/11,197.35 = 5,428.76/x
  3. Step 3: Cross multiply
    8,112.38x = 11,197.35 × 5,428.76
  4. Step 4: Simplify right side
    8,112.38x = 60,787,669.80
  5. Step 5: Solve for x
    x = 60,787,669.80/8,112.38
  6. Step 6: Final answer
    x = 7,493.20

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.