Home / 11,125.38-15,346.97-7,147.09

Finding the Fourth Proportional to 11,125.38, 15,346.97 and 7,147.09

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Solution

The fourth proportional to 11,125.38, 15,346.97 and 7,147.09 is: 9,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,125.38 : 15,346.97 = 7,147.09 : x
  2. Step 2: Convert to fraction form
    11,125.38/15,346.97 = 7,147.09/x
  3. Step 3: Cross multiply
    11,125.38x = 15,346.97 × 7,147.09
  4. Step 4: Simplify right side
    11,125.38x = 109,686,099.74
  5. Step 5: Solve for x
    x = 109,686,099.74/11,125.38
  6. Step 6: Final answer
    x = 9,859.09

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Half scale
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Double scale
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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.