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Finding the Fourth Proportional to 8,716.76, 12,030.15 and 5,179.97

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Solution

The fourth proportional to 8,716.76, 12,030.15 and 5,179.97 is: 7,148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,716.76 : 12,030.15 = 5,179.97 : x
  2. Step 2: Convert to fraction form
    8,716.76/12,030.15 = 5,179.97/x
  3. Step 3: Cross multiply
    8,716.76x = 12,030.15 × 5,179.97
  4. Step 4: Simplify right side
    8,716.76x = 62,315,816.10
  5. Step 5: Solve for x
    x = 62,315,816.10/8,716.76
  6. Step 6: Final answer
    x = 7,148.97

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Half scale
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Double 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.