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Finding the Fourth Proportional to 8,313.40, 12,470.10 and 7,679.80

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Solution

The fourth proportional to 8,313.40, 12,470.10 and 7,679.80 is: 11,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.40 : 12,470.10 = 7,679.80 : x
  2. Step 2: Convert to fraction form
    8,313.40/12,470.10 = 7,679.80/x
  3. Step 3: Cross multiply
    8,313.40x = 12,470.10 × 7,679.80
  4. Step 4: Simplify right side
    8,313.40x = 95,767,873.98
  5. Step 5: Solve for x
    x = 95,767,873.98/8,313.40
  6. Step 6: Final answer
    x = 11,519.70

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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.