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Finding the Fourth Proportional to 28,791.70, 39,731.61 and 17,613.70

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Solution

The fourth proportional to 28,791.70, 39,731.61 and 17,613.70 is: 24,306.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791.70 : 39,731.61 = 17,613.70 : x
  2. Step 2: Convert to fraction form
    28,791.70/39,731.61 = 17,613.70/x
  3. Step 3: Cross multiply
    28,791.70x = 39,731.61 × 17,613.70
  4. Step 4: Simplify right side
    28,791.70x = 699,820,659.06
  5. Step 5: Solve for x
    x = 699,820,659.06/28,791.70
  6. Step 6: Final answer
    x = 24,306.33

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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.