Home / 21,231.76-31,849.66-8,752.62

Finding the Fourth Proportional to 21,231.76, 31,849.66 and 8,752.62

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Solution

The fourth proportional to 21,231.76, 31,849.66 and 8,752.62 is: 13,129.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.76 : 31,849.66 = 8,752.62 : x
  2. Step 2: Convert to fraction form
    21,231.76/31,849.66 = 8,752.62/x
  3. Step 3: Cross multiply
    21,231.76x = 31,849.66 × 8,752.62
  4. Step 4: Simplify right side
    21,231.76x = 278,767,971.11
  5. Step 5: Solve for x
    x = 278,767,971.11/21,231.76
  6. Step 6: Final answer
    x = 13,129.76

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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.