Home / 20,806.89-28,726.20-13,545.87

Finding the Fourth Proportional to 20,806.89, 28,726.20 and 13,545.87

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Solution

The fourth proportional to 20,806.89, 28,726.20 and 13,545.87 is: 18,701.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.89 : 28,726.20 = 13,545.87 : x
  2. Step 2: Convert to fraction form
    20,806.89/28,726.20 = 13,545.87/x
  3. Step 3: Cross multiply
    20,806.89x = 28,726.20 × 13,545.87
  4. Step 4: Simplify right side
    20,806.89x = 389,121,370.79
  5. Step 5: Solve for x
    x = 389,121,370.79/20,806.89
  6. Step 6: Final answer
    x = 18,701.56

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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.