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Finding the Fourth Proportional to 21,348.60, 32,027.90 and 7,308.78

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Solution

The fourth proportional to 21,348.60, 32,027.90 and 7,308.78 is: 10,964.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.60 : 32,027.90 = 7,308.78 : x
  2. Step 2: Convert to fraction form
    21,348.60/32,027.90 = 7,308.78/x
  3. Step 3: Cross multiply
    21,348.60x = 32,027.90 × 7,308.78
  4. Step 4: Simplify right side
    21,348.60x = 234,084,874.96
  5. Step 5: Solve for x
    x = 234,084,874.96/21,348.60
  6. Step 6: Final answer
    x = 10,964.88

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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.