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Finding the Fourth Proportional to 15,761.32, 21,751.62 and 9,049.12

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Solution

The fourth proportional to 15,761.32, 21,751.62 and 9,049.12 is: 12,488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.32 : 21,751.62 = 9,049.12 : x
  2. Step 2: Convert to fraction form
    15,761.32/21,751.62 = 9,049.12/x
  3. Step 3: Cross multiply
    15,761.32x = 21,751.62 × 9,049.12
  4. Step 4: Simplify right side
    15,761.32x = 196,833,019.57
  5. Step 5: Solve for x
    x = 196,833,019.57/15,761.32
  6. Step 6: Final answer
    x = 12,488.36

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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.