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Finding the Fourth Proportional to 9,212.92, 12,612.11 and 9,147.04

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Solution

The fourth proportional to 9,212.92, 12,612.11 and 9,147.04 is: 12,521.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,212.92 : 12,612.11 = 9,147.04 : x
  2. Step 2: Convert to fraction form
    9,212.92/12,612.11 = 9,147.04/x
  3. Step 3: Cross multiply
    9,212.92x = 12,612.11 × 9,147.04
  4. Step 4: Simplify right side
    9,212.92x = 115,363,474.65
  5. Step 5: Solve for x
    x = 115,363,474.65/9,212.92
  6. Step 6: Final answer
    x = 12,521.92

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