Home / 9,192.72-12,678.75-8,131.62

Finding the Fourth Proportional to 9,192.72, 12,678.75 and 8,131.62

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Solution

The fourth proportional to 9,192.72, 12,678.75 and 8,131.62 is: 11,215.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,192.72 : 12,678.75 = 8,131.62 : x
  2. Step 2: Convert to fraction form
    9,192.72/12,678.75 = 8,131.62/x
  3. Step 3: Cross multiply
    9,192.72x = 12,678.75 × 8,131.62
  4. Step 4: Simplify right side
    9,192.72x = 103,098,777.08
  5. Step 5: Solve for x
    x = 103,098,777.08/9,192.72
  6. Step 6: Final answer
    x = 11,215.26

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