Home / 20,679.90-31,000.60-7,529.28

Finding the Fourth Proportional to 20,679.90, 31,000.60 and 7,529.28

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Solution

The fourth proportional to 20,679.90, 31,000.60 and 7,529.28 is: 11,286.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.90 : 31,000.60 = 7,529.28 : x
  2. Step 2: Convert to fraction form
    20,679.90/31,000.60 = 7,529.28/x
  3. Step 3: Cross multiply
    20,679.90x = 31,000.60 × 7,529.28
  4. Step 4: Simplify right side
    20,679.90x = 233,412,197.57
  5. Step 5: Solve for x
    x = 233,412,197.57/20,679.90
  6. Step 6: Final answer
    x = 11,286.91

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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.