Home / 20,987.73-31,472.30-11,124.69

Finding the Fourth Proportional to 20,987.73, 31,472.30 and 11,124.69

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Solution

The fourth proportional to 20,987.73, 31,472.30 and 11,124.69 is: 16,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.73 : 31,472.30 = 11,124.69 : x
  2. Step 2: Convert to fraction form
    20,987.73/31,472.30 = 11,124.69/x
  3. Step 3: Cross multiply
    20,987.73x = 31,472.30 × 11,124.69
  4. Step 4: Simplify right side
    20,987.73x = 350,119,525.46
  5. Step 5: Solve for x
    x = 350,119,525.46/20,987.73
  6. Step 6: Final answer
    x = 16,682.11

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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.