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Finding the Fourth Proportional to 31,311.68, 43,223.68 and 18,734.08

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Solution

The fourth proportional to 31,311.68, 43,223.68 and 18,734.08 is: 25,861.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,311.68 : 43,223.68 = 18,734.08 : x
  2. Step 2: Convert to fraction form
    31,311.68/43,223.68 = 18,734.08/x
  3. Step 3: Cross multiply
    31,311.68x = 43,223.68 × 18,734.08
  4. Step 4: Simplify right side
    31,311.68x = 809,755,879.01
  5. Step 5: Solve for x
    x = 809,755,879.01/31,311.68
  6. Step 6: Final answer
    x = 25,861.14

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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.