Home / 20,680.12-28,548.48-12,729.16

Finding the Fourth Proportional to 20,680.12, 28,548.48 and 12,729.16

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Solution

The fourth proportional to 20,680.12, 28,548.48 and 12,729.16 is: 17,572.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.12 : 28,548.48 = 12,729.16 : x
  2. Step 2: Convert to fraction form
    20,680.12/28,548.48 = 12,729.16/x
  3. Step 3: Cross multiply
    20,680.12x = 28,548.48 × 12,729.16
  4. Step 4: Simplify right side
    20,680.12x = 363,398,169.68
  5. Step 5: Solve for x
    x = 363,398,169.68/20,680.12
  6. Step 6: Final answer
    x = 17,572.34

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.