Home / 12,545.90-18,819.75-3,781.49

Finding the Fourth Proportional to 12,545.90, 18,819.75 and 3,781.49

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Solution

The fourth proportional to 12,545.90, 18,819.75 and 3,781.49 is: 5,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,545.90 : 18,819.75 = 3,781.49 : x
  2. Step 2: Convert to fraction form
    12,545.90/18,819.75 = 3,781.49/x
  3. Step 3: Cross multiply
    12,545.90x = 18,819.75 × 3,781.49
  4. Step 4: Simplify right side
    12,545.90x = 71,166,696.43
  5. Step 5: Solve for x
    x = 71,166,696.43/12,545.90
  6. Step 6: Final answer
    x = 5,672.51

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1.5x scale

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.