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Finding the Fourth Proportional to 15,001.31, 20,701.68 and 8,287.11

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Solution

The fourth proportional to 15,001.31, 20,701.68 and 8,287.11 is: 11,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,001.31 : 20,701.68 = 8,287.11 : x
  2. Step 2: Convert to fraction form
    15,001.31/20,701.68 = 8,287.11/x
  3. Step 3: Cross multiply
    15,001.31x = 20,701.68 × 8,287.11
  4. Step 4: Simplify right side
    15,001.31x = 171,557,099.34
  5. Step 5: Solve for x
    x = 171,557,099.34/15,001.31
  6. Step 6: Final answer
    x = 11,436.14

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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.