Home / 15,343.38-21,174.63-8,631.12

Finding the Fourth Proportional to 15,343.38, 21,174.63 and 8,631.12

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Solution

The fourth proportional to 15,343.38, 21,174.63 and 8,631.12 is: 11,911.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.38 : 21,174.63 = 8,631.12 : x
  2. Step 2: Convert to fraction form
    15,343.38/21,174.63 = 8,631.12/x
  3. Step 3: Cross multiply
    15,343.38x = 21,174.63 × 8,631.12
  4. Step 4: Simplify right side
    15,343.38x = 182,760,772.49
  5. Step 5: Solve for x
    x = 182,760,772.49/15,343.38
  6. Step 6: Final answer
    x = 11,911.38

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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.