Home / 21,179.72-31,761.92-6,384.04

Finding the Fourth Proportional to 21,179.72, 31,761.92 and 6,384.04

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Solution

The fourth proportional to 21,179.72, 31,761.92 and 6,384.04 is: 9,573.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.72 : 31,761.92 = 6,384.04 : x
  2. Step 2: Convert to fraction form
    21,179.72/31,761.92 = 6,384.04/x
  3. Step 3: Cross multiply
    21,179.72x = 31,761.92 × 6,384.04
  4. Step 4: Simplify right side
    21,179.72x = 202,769,367.76
  5. Step 5: Solve for x
    x = 202,769,367.76/21,179.72
  6. Step 6: Final answer
    x = 9,573.75

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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.