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Finding the Fourth Proportional to 11,121, 15,343.96 and 6,642.76

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Solution

The fourth proportional to 11,121, 15,343.96 and 6,642.76 is: 9,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121 : 15,343.96 = 6,642.76 : x
  2. Step 2: Convert to fraction form
    11,121/15,343.96 = 6,642.76/x
  3. Step 3: Cross multiply
    11,121x = 15,343.96 × 6,642.76
  4. Step 4: Simplify right side
    11,121x = 101,926,243.73
  5. Step 5: Solve for x
    x = 101,926,243.73/11,121
  6. Step 6: Final answer
    x = 9,165.20

Related Problems

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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.