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Finding the Fourth Proportional to 28,891.80, 43,308.54 and 15,716.88

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Solution

The fourth proportional to 28,891.80, 43,308.54 and 15,716.88 is: 23,559.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,891.80 : 43,308.54 = 15,716.88 : x
  2. Step 2: Convert to fraction form
    28,891.80/43,308.54 = 15,716.88/x
  3. Step 3: Cross multiply
    28,891.80x = 43,308.54 × 15,716.88
  4. Step 4: Simplify right side
    28,891.80x = 680,675,126.16
  5. Step 5: Solve for x
    x = 680,675,126.16/28,891.80
  6. Step 6: Final answer
    x = 23,559.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.