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Finding the Fourth Proportional to 21,520.87, 32,275.02 and 8,370.11

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Solution

The fourth proportional to 21,520.87, 32,275.02 and 8,370.11 is: 12,552.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.87 : 32,275.02 = 8,370.11 : x
  2. Step 2: Convert to fraction form
    21,520.87/32,275.02 = 8,370.11/x
  3. Step 3: Cross multiply
    21,520.87x = 32,275.02 × 8,370.11
  4. Step 4: Simplify right side
    21,520.87x = 270,145,467.65
  5. Step 5: Solve for x
    x = 270,145,467.65/21,520.87
  6. Step 6: Final answer
    x = 12,552.72

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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.