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Finding the Fourth Proportional to 21,894.60, 32,820.30 and 10,792.20

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Solution

The fourth proportional to 21,894.60, 32,820.30 and 10,792.20 is: 16,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.60 : 32,820.30 = 10,792.20 : x
  2. Step 2: Convert to fraction form
    21,894.60/32,820.30 = 10,792.20/x
  3. Step 3: Cross multiply
    21,894.60x = 32,820.30 × 10,792.20
  4. Step 4: Simplify right side
    21,894.60x = 354,203,241.66
  5. Step 5: Solve for x
    x = 354,203,241.66/21,894.60
  6. Step 6: Final answer
    x = 16,177.65

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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.