Home / 20,679.78-31,001.16-7,522.86

Finding the Fourth Proportional to 20,679.78, 31,001.16 and 7,522.86

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Solution

The fourth proportional to 20,679.78, 31,001.16 and 7,522.86 is: 11,277.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.78 : 31,001.16 = 7,522.86 : x
  2. Step 2: Convert to fraction form
    20,679.78/31,001.16 = 7,522.86/x
  3. Step 3: Cross multiply
    20,679.78x = 31,001.16 × 7,522.86
  4. Step 4: Simplify right side
    20,679.78x = 233,217,386.52
  5. Step 5: Solve for x
    x = 233,217,386.52/20,679.78
  6. Step 6: Final answer
    x = 11,277.56

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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.