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Finding the Fourth Proportional to 21,651, 32,382.68 and 12,745.11

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Solution

The fourth proportional to 21,651, 32,382.68 and 12,745.11 is: 19,062.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651 : 32,382.68 = 12,745.11 : x
  2. Step 2: Convert to fraction form
    21,651/32,382.68 = 12,745.11/x
  3. Step 3: Cross multiply
    21,651x = 32,382.68 × 12,745.11
  4. Step 4: Simplify right side
    21,651x = 412,720,850.56
  5. Step 5: Solve for x
    x = 412,720,850.56/21,651
  6. Step 6: Final answer
    x = 19,062.44

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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.