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Finding the Fourth Proportional to 28,010.70, 42,016.05 and 16,929.90

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Solution

The fourth proportional to 28,010.70, 42,016.05 and 16,929.90 is: 25,394.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.70 : 42,016.05 = 16,929.90 : x
  2. Step 2: Convert to fraction form
    28,010.70/42,016.05 = 16,929.90/x
  3. Step 3: Cross multiply
    28,010.70x = 42,016.05 × 16,929.90
  4. Step 4: Simplify right side
    28,010.70x = 711,327,524.90
  5. Step 5: Solve for x
    x = 711,327,524.90/28,010.70
  6. Step 6: Final answer
    x = 25,394.85

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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.