Home / 19,910.40-29,659.20-19,449.60

Finding the Fourth Proportional to 19,910.40, 29,659.20 and 19,449.60

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Solution

The fourth proportional to 19,910.40, 29,659.20 and 19,449.60 is: 28,972.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,910.40 : 29,659.20 = 19,449.60 : x
  2. Step 2: Convert to fraction form
    19,910.40/29,659.20 = 19,449.60/x
  3. Step 3: Cross multiply
    19,910.40x = 29,659.20 × 19,449.60
  4. Step 4: Simplify right side
    19,910.40x = 576,859,576.32
  5. Step 5: Solve for x
    x = 576,859,576.32/19,910.40
  6. Step 6: Final answer
    x = 28,972.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.