Home / 11,126.97-15,340.89-7,146.63

Finding the Fourth Proportional to 11,126.97, 15,340.89 and 7,146.63

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Solution

The fourth proportional to 11,126.97, 15,340.89 and 7,146.63 is: 9,853.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,126.97 : 15,340.89 = 7,146.63 : x
  2. Step 2: Convert to fraction form
    11,126.97/15,340.89 = 7,146.63/x
  3. Step 3: Cross multiply
    11,126.97x = 15,340.89 × 7,146.63
  4. Step 4: Simplify right side
    11,126.97x = 109,635,691.50
  5. Step 5: Solve for x
    x = 109,635,691.50/11,126.97
  6. Step 6: Final answer
    x = 9,853.15

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Half scale
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Double scale
Find fourth proportional to 11,127.97, 15,342.27 and 7,147.63
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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.