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Finding the Fourth Proportional to 15,015.74, 20,713.52 and 9,043.78

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Solution

The fourth proportional to 15,015.74, 20,713.52 and 9,043.78 is: 12,475.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.74 : 20,713.52 = 9,043.78 : x
  2. Step 2: Convert to fraction form
    15,015.74/20,713.52 = 9,043.78/x
  3. Step 3: Cross multiply
    15,015.74x = 20,713.52 × 9,043.78
  4. Step 4: Simplify right side
    15,015.74x = 187,328,517.91
  5. Step 5: Solve for x
    x = 187,328,517.91/15,015.74
  6. Step 6: Final answer
    x = 12,475.48

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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.