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Finding the Fourth Proportional to 22,145.60, 33,218.40 and 21,915.20

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Solution

The fourth proportional to 22,145.60, 33,218.40 and 21,915.20 is: 32,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,145.60 : 33,218.40 = 21,915.20 : x
  2. Step 2: Convert to fraction form
    22,145.60/33,218.40 = 21,915.20/x
  3. Step 3: Cross multiply
    22,145.60x = 33,218.40 × 21,915.20
  4. Step 4: Simplify right side
    22,145.60x = 727,987,879.68
  5. Step 5: Solve for x
    x = 727,987,879.68/22,145.60
  6. Step 6: Final answer
    x = 32,872.80

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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.