Home / 20,869.97-28,800.49-11,309.89

Finding the Fourth Proportional to 20,869.97, 28,800.49 and 11,309.89

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Solution

The fourth proportional to 20,869.97, 28,800.49 and 11,309.89 is: 15,607.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.97 : 28,800.49 = 11,309.89 : x
  2. Step 2: Convert to fraction form
    20,869.97/28,800.49 = 11,309.89/x
  3. Step 3: Cross multiply
    20,869.97x = 28,800.49 × 11,309.89
  4. Step 4: Simplify right side
    20,869.97x = 325,730,373.85
  5. Step 5: Solve for x
    x = 325,730,373.85/20,869.97
  6. Step 6: Final answer
    x = 15,607.61

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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.