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Finding the Fourth Proportional to 8,719.81, 13,079.71 and 7,174.56

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Solution

The fourth proportional to 8,719.81, 13,079.71 and 7,174.56 is: 10,761.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.81 : 13,079.71 = 7,174.56 : x
  2. Step 2: Convert to fraction form
    8,719.81/13,079.71 = 7,174.56/x
  3. Step 3: Cross multiply
    8,719.81x = 13,079.71 × 7,174.56
  4. Step 4: Simplify right side
    8,719.81x = 93,841,128.30
  5. Step 5: Solve for x
    x = 93,841,128.30/8,719.81
  6. Step 6: Final answer
    x = 10,761.84

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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.