Home / 20,961.47-28,932.98-12,469.56

Finding the Fourth Proportional to 20,961.47, 28,932.98 and 12,469.56

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Solution

The fourth proportional to 20,961.47, 28,932.98 and 12,469.56 is: 17,211.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.47 : 28,932.98 = 12,469.56 : x
  2. Step 2: Convert to fraction form
    20,961.47/28,932.98 = 12,469.56/x
  3. Step 3: Cross multiply
    20,961.47x = 28,932.98 × 12,469.56
  4. Step 4: Simplify right side
    20,961.47x = 360,781,467.74
  5. Step 5: Solve for x
    x = 360,781,467.74/20,961.47
  6. Step 6: Final answer
    x = 17,211.65

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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.