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Finding the Fourth Proportional to 21,806.60, 32,712.30 and 7,958.60

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Solution

The fourth proportional to 21,806.60, 32,712.30 and 7,958.60 is: 11,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,806.60 : 32,712.30 = 7,958.60 : x
  2. Step 2: Convert to fraction form
    21,806.60/32,712.30 = 7,958.60/x
  3. Step 3: Cross multiply
    21,806.60x = 32,712.30 × 7,958.60
  4. Step 4: Simplify right side
    21,806.60x = 260,344,110.78
  5. Step 5: Solve for x
    x = 260,344,110.78/21,806.60
  6. Step 6: Final answer
    x = 11,938.78

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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.