Home / 21,489.76-32,179.56-12,730.96

Finding the Fourth Proportional to 21,489.76, 32,179.56 and 12,730.96

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Solution

The fourth proportional to 21,489.76, 32,179.56 and 12,730.96 is: 19,063.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.76 : 32,179.56 = 12,730.96 : x
  2. Step 2: Convert to fraction form
    21,489.76/32,179.56 = 12,730.96/x
  3. Step 3: Cross multiply
    21,489.76x = 32,179.56 × 12,730.96
  4. Step 4: Simplify right side
    21,489.76x = 409,676,691.18
  5. Step 5: Solve for x
    x = 409,676,691.18/21,489.76
  6. Step 6: Final answer
    x = 19,063.81

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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.