Home / 20,690.25-28,552.55-11,258.88

Finding the Fourth Proportional to 20,690.25, 28,552.55 and 11,258.88

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Solution

The fourth proportional to 20,690.25, 28,552.55 and 11,258.88 is: 15,537.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.25 : 28,552.55 = 11,258.88 : x
  2. Step 2: Convert to fraction form
    20,690.25/28,552.55 = 11,258.88/x
  3. Step 3: Cross multiply
    20,690.25x = 28,552.55 × 11,258.88
  4. Step 4: Simplify right side
    20,690.25x = 321,469,677.85
  5. Step 5: Solve for x
    x = 321,469,677.85/20,690.25
  6. Step 6: Final answer
    x = 15,537.25

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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.