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Finding the Fourth Proportional to 31,806.50, 43,895.02 and 18,378.32

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Solution

The fourth proportional to 31,806.50, 43,895.02 and 18,378.32 is: 25,363.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,806.50 : 43,895.02 = 18,378.32 : x
  2. Step 2: Convert to fraction form
    31,806.50/43,895.02 = 18,378.32/x
  3. Step 3: Cross multiply
    31,806.50x = 43,895.02 × 18,378.32
  4. Step 4: Simplify right side
    31,806.50x = 806,716,723.97
  5. Step 5: Solve for x
    x = 806,716,723.97/31,806.50
  6. Step 6: Final answer
    x = 25,363.27

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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.