Home / 21,174.99-31,765.93-8,691.66

Finding the Fourth Proportional to 21,174.99, 31,765.93 and 8,691.66

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Solution

The fourth proportional to 21,174.99, 31,765.93 and 8,691.66 is: 13,038.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.99 : 31,765.93 = 8,691.66 : x
  2. Step 2: Convert to fraction form
    21,174.99/31,765.93 = 8,691.66/x
  3. Step 3: Cross multiply
    21,174.99x = 31,765.93 × 8,691.66
  4. Step 4: Simplify right side
    21,174.99x = 276,098,663.14
  5. Step 5: Solve for x
    x = 276,098,663.14/21,174.99
  6. Step 6: Final answer
    x = 13,038.90

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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.