Home / 39,680.88-54,759.52-21,531.60

Finding the Fourth Proportional to 39,680.88, 54,759.52 and 21,531.60

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Solution

The fourth proportional to 39,680.88, 54,759.52 and 21,531.60 is: 29,713.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,680.88 : 54,759.52 = 21,531.60 : x
  2. Step 2: Convert to fraction form
    39,680.88/54,759.52 = 21,531.60/x
  3. Step 3: Cross multiply
    39,680.88x = 54,759.52 × 21,531.60
  4. Step 4: Simplify right side
    39,680.88x = 1,179,060,080.83
  5. Step 5: Solve for x
    x = 1,179,060,080.83/39,680.88
  6. Step 6: Final answer
    x = 29,713.56

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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.