Home / 21,621.44-29,836.68-12,190.88

Finding the Fourth Proportional to 21,621.44, 29,836.68 and 12,190.88

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Solution

The fourth proportional to 21,621.44, 29,836.68 and 12,190.88 is: 16,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.44 : 29,836.68 = 12,190.88 : x
  2. Step 2: Convert to fraction form
    21,621.44/29,836.68 = 12,190.88/x
  3. Step 3: Cross multiply
    21,621.44x = 29,836.68 × 12,190.88
  4. Step 4: Simplify right side
    21,621.44x = 363,735,385.48
  5. Step 5: Solve for x
    x = 363,735,385.48/21,621.44
  6. Step 6: Final answer
    x = 16,822.90

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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.