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Finding the Fourth Proportional to 19,801.60, 29,659.20 and 17,612.80

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Solution

The fourth proportional to 19,801.60, 29,659.20 and 17,612.80 is: 26,380.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,801.60 : 29,659.20 = 17,612.80 : x
  2. Step 2: Convert to fraction form
    19,801.60/29,659.20 = 17,612.80/x
  3. Step 3: Cross multiply
    19,801.60x = 29,659.20 × 17,612.80
  4. Step 4: Simplify right side
    19,801.60x = 522,381,557.76
  5. Step 5: Solve for x
    x = 522,381,557.76/19,801.60
  6. Step 6: Final answer
    x = 26,380.78

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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.