Home / 21,620.20-29,838.18-13,234.60

Finding the Fourth Proportional to 21,620.20, 29,838.18 and 13,234.60

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Solution

The fourth proportional to 21,620.20, 29,838.18 and 13,234.60 is: 18,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.20 : 29,838.18 = 13,234.60 : x
  2. Step 2: Convert to fraction form
    21,620.20/29,838.18 = 13,234.60/x
  3. Step 3: Cross multiply
    21,620.20x = 29,838.18 × 13,234.60
  4. Step 4: Simplify right side
    21,620.20x = 394,896,377.03
  5. Step 5: Solve for x
    x = 394,896,377.03/21,620.20
  6. Step 6: Final answer
    x = 18,265.16

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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.