Home / 13,805.29-20,800.15-12,490.73

Finding the Fourth Proportional to 13,805.29, 20,800.15 and 12,490.73

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Solution

The fourth proportional to 13,805.29, 20,800.15 and 12,490.73 is: 18,819.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,805.29 : 20,800.15 = 12,490.73 : x
  2. Step 2: Convert to fraction form
    13,805.29/20,800.15 = 12,490.73/x
  3. Step 3: Cross multiply
    13,805.29x = 20,800.15 × 12,490.73
  4. Step 4: Simplify right side
    13,805.29x = 259,809,057.61
  5. Step 5: Solve for x
    x = 259,809,057.61/13,805.29
  6. Step 6: Final answer
    x = 18,819.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.