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Finding the Fourth Proportional to 28,241.28, 38,978.64 and 16,306.56

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Solution

The fourth proportional to 28,241.28, 38,978.64 and 16,306.56 is: 22,506.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,241.28 : 38,978.64 = 16,306.56 : x
  2. Step 2: Convert to fraction form
    28,241.28/38,978.64 = 16,306.56/x
  3. Step 3: Cross multiply
    28,241.28x = 38,978.64 × 16,306.56
  4. Step 4: Simplify right side
    28,241.28x = 635,607,531.88
  5. Step 5: Solve for x
    x = 635,607,531.88/28,241.28
  6. Step 6: Final answer
    x = 22,506.33

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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.