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Finding the Fourth Proportional to 21,694.30, 32,559.84 and 8,555.90

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Solution

The fourth proportional to 21,694.30, 32,559.84 and 8,555.90 is: 12,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,694.30 : 32,559.84 = 8,555.90 : x
  2. Step 2: Convert to fraction form
    21,694.30/32,559.84 = 8,555.90/x
  3. Step 3: Cross multiply
    21,694.30x = 32,559.84 × 8,555.90
  4. Step 4: Simplify right side
    21,694.30x = 278,578,572.26
  5. Step 5: Solve for x
    x = 278,578,572.26/21,694.30
  6. Step 6: Final answer
    x = 12,841.10

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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.