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Finding the Fourth Proportional to 21,063.42, 31,595.04 and 5,481

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Solution

The fourth proportional to 21,063.42, 31,595.04 and 5,481 is: 8,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.42 : 31,595.04 = 5,481 : x
  2. Step 2: Convert to fraction form
    21,063.42/31,595.04 = 5,481/x
  3. Step 3: Cross multiply
    21,063.42x = 31,595.04 × 5,481
  4. Step 4: Simplify right side
    21,063.42x = 173,172,414.24
  5. Step 5: Solve for x
    x = 173,172,414.24/21,063.42
  6. Step 6: Final answer
    x = 8,221.48

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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.