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Finding the Fourth Proportional to 15,025.84, 20,734.26 and 8,311.29

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Solution

The fourth proportional to 15,025.84, 20,734.26 and 8,311.29 is: 11,468.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.84 : 20,734.26 = 8,311.29 : x
  2. Step 2: Convert to fraction form
    15,025.84/20,734.26 = 8,311.29/x
  3. Step 3: Cross multiply
    15,025.84x = 20,734.26 × 8,311.29
  4. Step 4: Simplify right side
    15,025.84x = 172,328,447.80
  5. Step 5: Solve for x
    x = 172,328,447.80/15,025.84
  6. Step 6: Final answer
    x = 11,468.81

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1.5x scale

Why These Related Problems?

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