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Finding the Fourth Proportional to 8,706.92, 12,013.86 and 5,171.24

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Solution

The fourth proportional to 8,706.92, 12,013.86 and 5,171.24 is: 7,135.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.92 : 12,013.86 = 5,171.24 : x
  2. Step 2: Convert to fraction form
    8,706.92/12,013.86 = 5,171.24/x
  3. Step 3: Cross multiply
    8,706.92x = 12,013.86 × 5,171.24
  4. Step 4: Simplify right side
    8,706.92x = 62,126,553.39
  5. Step 5: Solve for x
    x = 62,126,553.39/8,706.92
  6. Step 6: Final answer
    x = 7,135.31

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Half scale
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Double scale
Find fourth proportional to 8,707.92, 12,015.24 and 5,172.24
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.