Home / 21,180.45-31,764.60-6,385.80

Finding the Fourth Proportional to 21,180.45, 31,764.60 and 6,385.80

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Solution

The fourth proportional to 21,180.45, 31,764.60 and 6,385.80 is: 9,576.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.45 : 31,764.60 = 6,385.80 : x
  2. Step 2: Convert to fraction form
    21,180.45/31,764.60 = 6,385.80/x
  3. Step 3: Cross multiply
    21,180.45x = 31,764.60 × 6,385.80
  4. Step 4: Simplify right side
    21,180.45x = 202,842,382.68
  5. Step 5: Solve for x
    x = 202,842,382.68/21,180.45
  6. Step 6: Final answer
    x = 9,576.87

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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.