Home / 21,540.20-29,724.53-11,980.04

Finding the Fourth Proportional to 21,540.20, 29,724.53 and 11,980.04

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Solution

The fourth proportional to 21,540.20, 29,724.53 and 11,980.04 is: 16,531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.20 : 29,724.53 = 11,980.04 : x
  2. Step 2: Convert to fraction form
    21,540.20/29,724.53 = 11,980.04/x
  3. Step 3: Cross multiply
    21,540.20x = 29,724.53 × 11,980.04
  4. Step 4: Simplify right side
    21,540.20x = 356,100,849.86
  5. Step 5: Solve for x
    x = 356,100,849.86/21,540.20
  6. Step 6: Final answer
    x = 16,531.92

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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.