Home / 8,313.72-11,488.14-7,908.76

Finding the Fourth Proportional to 8,313.72, 11,488.14 and 7,908.76

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Solution

The fourth proportional to 8,313.72, 11,488.14 and 7,908.76 is: 10,928.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.72 : 11,488.14 = 7,908.76 : x
  2. Step 2: Convert to fraction form
    8,313.72/11,488.14 = 7,908.76/x
  3. Step 3: Cross multiply
    8,313.72x = 11,488.14 × 7,908.76
  4. Step 4: Simplify right side
    8,313.72x = 90,856,942.11
  5. Step 5: Solve for x
    x = 90,856,942.11/8,313.72
  6. Step 6: Final answer
    x = 10,928.55

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.