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Finding the Fourth Proportional to 11,347.92, 15,660.18 and 6,631.20

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Solution

The fourth proportional to 11,347.92, 15,660.18 and 6,631.20 is: 9,151.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,347.92 : 15,660.18 = 6,631.20 : x
  2. Step 2: Convert to fraction form
    11,347.92/15,660.18 = 6,631.20/x
  3. Step 3: Cross multiply
    11,347.92x = 15,660.18 × 6,631.20
  4. Step 4: Simplify right side
    11,347.92x = 103,845,785.62
  5. Step 5: Solve for x
    x = 103,845,785.62/11,347.92
  6. Step 6: Final answer
    x = 9,151.09

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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.