Home / 22,780.74-31,438.20-13,219.89

Finding the Fourth Proportional to 22,780.74, 31,438.20 and 13,219.89

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Solution

The fourth proportional to 22,780.74, 31,438.20 and 13,219.89 is: 18,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,780.74 : 31,438.20 = 13,219.89 : x
  2. Step 2: Convert to fraction form
    22,780.74/31,438.20 = 13,219.89/x
  3. Step 3: Cross multiply
    22,780.74x = 31,438.20 × 13,219.89
  4. Step 4: Simplify right side
    22,780.74x = 415,609,545.80
  5. Step 5: Solve for x
    x = 415,609,545.80/22,780.74
  6. Step 6: Final answer
    x = 18,243.90

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1.5x scale

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.