Home / 21,248.09-31,793.51-12,819.48

Finding the Fourth Proportional to 21,248.09, 31,793.51 and 12,819.48

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Solution

The fourth proportional to 21,248.09, 31,793.51 and 12,819.48 is: 19,181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.09 : 31,793.51 = 12,819.48 : x
  2. Step 2: Convert to fraction form
    21,248.09/31,793.51 = 12,819.48/x
  3. Step 3: Cross multiply
    21,248.09x = 31,793.51 × 12,819.48
  4. Step 4: Simplify right side
    21,248.09x = 407,576,265.57
  5. Step 5: Solve for x
    x = 407,576,265.57/21,248.09
  6. Step 6: Final answer
    x = 19,181.78

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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.