Home / 20,408.28-28,164.69-13,590.61

Finding the Fourth Proportional to 20,408.28, 28,164.69 and 13,590.61

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Solution

The fourth proportional to 20,408.28, 28,164.69 and 13,590.61 is: 18,755.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.28 : 28,164.69 = 13,590.61 : x
  2. Step 2: Convert to fraction form
    20,408.28/28,164.69 = 13,590.61/x
  3. Step 3: Cross multiply
    20,408.28x = 28,164.69 × 13,590.61
  4. Step 4: Simplify right side
    20,408.28x = 382,775,288.14
  5. Step 5: Solve for x
    x = 382,775,288.14/20,408.28
  6. Step 6: Final answer
    x = 18,755.88

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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.