Home / 21,422.80-32,134.20-21,204.10

Finding the Fourth Proportional to 21,422.80, 32,134.20 and 21,204.10

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Solution

The fourth proportional to 21,422.80, 32,134.20 and 21,204.10 is: 31,806.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,422.80 : 32,134.20 = 21,204.10 : x
  2. Step 2: Convert to fraction form
    21,422.80/32,134.20 = 21,204.10/x
  3. Step 3: Cross multiply
    21,422.80x = 32,134.20 × 21,204.10
  4. Step 4: Simplify right side
    21,422.80x = 681,376,790.22
  5. Step 5: Solve for x
    x = 681,376,790.22/21,422.80
  6. Step 6: Final answer
    x = 31,806.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.