Home / 20,553.03-28,363.23-11,121.59

Finding the Fourth Proportional to 20,553.03, 28,363.23 and 11,121.59

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Solution

The fourth proportional to 20,553.03, 28,363.23 and 11,121.59 is: 15,347.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.03 : 28,363.23 = 11,121.59 : x
  2. Step 2: Convert to fraction form
    20,553.03/28,363.23 = 11,121.59/x
  3. Step 3: Cross multiply
    20,553.03x = 28,363.23 × 11,121.59
  4. Step 4: Simplify right side
    20,553.03x = 315,444,286.04
  5. Step 5: Solve for x
    x = 315,444,286.04/20,553.03
  6. Step 6: Final answer
    x = 15,347.82

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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.