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Finding the Fourth Proportional to 13,540.88, 18,686.56 and 7,572.88

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Solution

The fourth proportional to 13,540.88, 18,686.56 and 7,572.88 is: 10,450.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.88 : 18,686.56 = 7,572.88 : x
  2. Step 2: Convert to fraction form
    13,540.88/18,686.56 = 7,572.88/x
  3. Step 3: Cross multiply
    13,540.88x = 18,686.56 × 7,572.88
  4. Step 4: Simplify right side
    13,540.88x = 141,511,076.49
  5. Step 5: Solve for x
    x = 141,511,076.49/13,540.88
  6. Step 6: Final answer
    x = 10,450.66

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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.