Home / 21,290.52-31,947.66-8,819.76

Finding the Fourth Proportional to 21,290.52, 31,947.66 and 8,819.76

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Solution

The fourth proportional to 21,290.52, 31,947.66 and 8,819.76 is: 13,234.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.52 : 31,947.66 = 8,819.76 : x
  2. Step 2: Convert to fraction form
    21,290.52/31,947.66 = 8,819.76/x
  3. Step 3: Cross multiply
    21,290.52x = 31,947.66 × 8,819.76
  4. Step 4: Simplify right side
    21,290.52x = 281,770,693.76
  5. Step 5: Solve for x
    x = 281,770,693.76/21,290.52
  6. Step 6: Final answer
    x = 13,234.56

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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.