Home / 21,573.18-29,769.30-12,139.92

Finding the Fourth Proportional to 21,573.18, 29,769.30 and 12,139.92

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Solution

The fourth proportional to 21,573.18, 29,769.30 and 12,139.92 is: 16,752.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,573.18 : 29,769.30 = 12,139.92 : x
  2. Step 2: Convert to fraction form
    21,573.18/29,769.30 = 12,139.92/x
  3. Step 3: Cross multiply
    21,573.18x = 29,769.30 × 12,139.92
  4. Step 4: Simplify right side
    21,573.18x = 361,396,920.46
  5. Step 5: Solve for x
    x = 361,396,920.46/21,573.18
  6. Step 6: Final answer
    x = 16,752.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.