Home / 20,840.04-28,759.07-11,279.74

Finding the Fourth Proportional to 20,840.04, 28,759.07 and 11,279.74

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Solution

The fourth proportional to 20,840.04, 28,759.07 and 11,279.74 is: 15,565.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.04 : 28,759.07 = 11,279.74 : x
  2. Step 2: Convert to fraction form
    20,840.04/28,759.07 = 11,279.74/x
  3. Step 3: Cross multiply
    20,840.04x = 28,759.07 × 11,279.74
  4. Step 4: Simplify right side
    20,840.04x = 324,394,788.54
  5. Step 5: Solve for x
    x = 324,394,788.54/20,840.04
  6. Step 6: Final answer
    x = 15,565.94

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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.