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Finding the Fourth Proportional to 15,010.40, 20,712.12 and 9,040.88

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Solution

The fourth proportional to 15,010.40, 20,712.12 and 9,040.88 is: 12,475.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,010.40 : 20,712.12 = 9,040.88 : x
  2. Step 2: Convert to fraction form
    15,010.40/20,712.12 = 9,040.88/x
  3. Step 3: Cross multiply
    15,010.40x = 20,712.12 × 9,040.88
  4. Step 4: Simplify right side
    15,010.40x = 187,255,791.47
  5. Step 5: Solve for x
    x = 187,255,791.47/15,010.40
  6. Step 6: Final answer
    x = 12,475.07

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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.