Home / 20,680.78-31,002.66-7,523.86

Finding the Fourth Proportional to 20,680.78, 31,002.66 and 7,523.86

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Solution

The fourth proportional to 20,680.78, 31,002.66 and 7,523.86 is: 11,279.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.78 : 31,002.66 = 7,523.86 : x
  2. Step 2: Convert to fraction form
    20,680.78/31,002.66 = 7,523.86/x
  3. Step 3: Cross multiply
    20,680.78x = 31,002.66 × 7,523.86
  4. Step 4: Simplify right side
    20,680.78x = 233,259,673.47
  5. Step 5: Solve for x
    x = 233,259,673.47/20,680.78
  6. Step 6: Final answer
    x = 11,279.06

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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.