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Finding the Fourth Proportional to 22,520.13, 31,075.08 and 12,447.21

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Solution

The fourth proportional to 22,520.13, 31,075.08 and 12,447.21 is: 17,175.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,520.13 : 31,075.08 = 12,447.21 : x
  2. Step 2: Convert to fraction form
    22,520.13/31,075.08 = 12,447.21/x
  3. Step 3: Cross multiply
    22,520.13x = 31,075.08 × 12,447.21
  4. Step 4: Simplify right side
    22,520.13x = 386,797,922.27
  5. Step 5: Solve for x
    x = 386,797,922.27/22,520.13
  6. Step 6: Final answer
    x = 17,175.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.