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Finding the Fourth Proportional to 21,520.84, 32,294.22 and 8,379.40

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Solution

The fourth proportional to 21,520.84, 32,294.22 and 8,379.40 is: 12,574.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.84 : 32,294.22 = 8,379.40 : x
  2. Step 2: Convert to fraction form
    21,520.84/32,294.22 = 8,379.40/x
  3. Step 3: Cross multiply
    21,520.84x = 32,294.22 × 8,379.40
  4. Step 4: Simplify right side
    21,520.84x = 270,606,187.07
  5. Step 5: Solve for x
    x = 270,606,187.07/21,520.84
  6. Step 6: Final answer
    x = 12,574.15

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.