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Finding the Fourth Proportional to 21,236.87, 31,855.10 and 5,654.49

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Solution

The fourth proportional to 21,236.87, 31,855.10 and 5,654.49 is: 8,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.87 : 31,855.10 = 5,654.49 : x
  2. Step 2: Convert to fraction form
    21,236.87/31,855.10 = 5,654.49/x
  3. Step 3: Cross multiply
    21,236.87x = 31,855.10 × 5,654.49
  4. Step 4: Simplify right side
    21,236.87x = 180,124,316.13
  5. Step 5: Solve for x
    x = 180,124,316.13/21,236.87
  6. Step 6: Final answer
    x = 8,481.68

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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.