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Finding the Fourth Proportional to 22,691.60, 34,053.60 and 12,820.40

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Solution

The fourth proportional to 22,691.60, 34,053.60 and 12,820.40 is: 19,239.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,691.60 : 34,053.60 = 12,820.40 : x
  2. Step 2: Convert to fraction form
    22,691.60/34,053.60 = 12,820.40/x
  3. Step 3: Cross multiply
    22,691.60x = 34,053.60 × 12,820.40
  4. Step 4: Simplify right side
    22,691.60x = 436,580,773.44
  5. Step 5: Solve for x
    x = 436,580,773.44/22,691.60
  6. Step 6: Final answer
    x = 19,239.75

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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.