Home / 20,422.46-28,181.70-11,469.74

Finding the Fourth Proportional to 20,422.46, 28,181.70 and 11,469.74

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Solution

The fourth proportional to 20,422.46, 28,181.70 and 11,469.74 is: 15,827.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.46 : 28,181.70 = 11,469.74 : x
  2. Step 2: Convert to fraction form
    20,422.46/28,181.70 = 11,469.74/x
  3. Step 3: Cross multiply
    20,422.46x = 28,181.70 × 11,469.74
  4. Step 4: Simplify right side
    20,422.46x = 323,236,630.85
  5. Step 5: Solve for x
    x = 323,236,630.85/20,422.46
  6. Step 6: Final answer
    x = 15,827.51

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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.