Home / 20,921.30-31,382.21-6,130.52

Finding the Fourth Proportional to 20,921.30, 31,382.21 and 6,130.52

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Solution

The fourth proportional to 20,921.30, 31,382.21 and 6,130.52 is: 9,195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.30 : 31,382.21 = 6,130.52 : x
  2. Step 2: Convert to fraction form
    20,921.30/31,382.21 = 6,130.52/x
  3. Step 3: Cross multiply
    20,921.30x = 31,382.21 × 6,130.52
  4. Step 4: Simplify right side
    20,921.30x = 192,389,250.72
  5. Step 5: Solve for x
    x = 192,389,250.72/20,921.30
  6. Step 6: Final answer
    x = 9,195.85

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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.