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Finding the Fourth Proportional to 28,251.49, 38,988.28 and 16,918.82

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Solution

The fourth proportional to 28,251.49, 38,988.28 and 16,918.82 is: 23,348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.49 : 38,988.28 = 16,918.82 : x
  2. Step 2: Convert to fraction form
    28,251.49/38,988.28 = 16,918.82/x
  3. Step 3: Cross multiply
    28,251.49x = 38,988.28 × 16,918.82
  4. Step 4: Simplify right side
    28,251.49x = 659,635,691.43
  5. Step 5: Solve for x
    x = 659,635,691.43/28,251.49
  6. Step 6: Final answer
    x = 23,348.70

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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.