Home / 20,925.82-28,876.97-11,493.78

Finding the Fourth Proportional to 20,925.82, 28,876.97 and 11,493.78

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Solution

The fourth proportional to 20,925.82, 28,876.97 and 11,493.78 is: 15,861.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.82 : 28,876.97 = 11,493.78 : x
  2. Step 2: Convert to fraction form
    20,925.82/28,876.97 = 11,493.78/x
  3. Step 3: Cross multiply
    20,925.82x = 28,876.97 × 11,493.78
  4. Step 4: Simplify right side
    20,925.82x = 331,905,540.25
  5. Step 5: Solve for x
    x = 331,905,540.25/20,925.82
  6. Step 6: Final answer
    x = 15,861.05

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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.