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Finding the Fourth Proportional to 10,881.31, 15,017.16 and 6,631.33

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Solution

The fourth proportional to 10,881.31, 15,017.16 and 6,631.33 is: 9,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.31 : 15,017.16 = 6,631.33 : x
  2. Step 2: Convert to fraction form
    10,881.31/15,017.16 = 6,631.33/x
  3. Step 3: Cross multiply
    10,881.31x = 15,017.16 × 6,631.33
  4. Step 4: Simplify right side
    10,881.31x = 99,583,743.62
  5. Step 5: Solve for x
    x = 99,583,743.62/10,881.31
  6. Step 6: Final answer
    x = 9,151.82

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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.