Home / 20,913.54-28,862.98-11,961.88

Finding the Fourth Proportional to 20,913.54, 28,862.98 and 11,961.88

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Solution

The fourth proportional to 20,913.54, 28,862.98 and 11,961.88 is: 16,508.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.54 : 28,862.98 = 11,961.88 : x
  2. Step 2: Convert to fraction form
    20,913.54/28,862.98 = 11,961.88/x
  3. Step 3: Cross multiply
    20,913.54x = 28,862.98 × 11,961.88
  4. Step 4: Simplify right side
    20,913.54x = 345,255,503.20
  5. Step 5: Solve for x
    x = 345,255,503.20/20,913.54
  6. Step 6: Final answer
    x = 16,508.71

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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.