Home / 31,639.82-43,672.10-18,220.55

Finding the Fourth Proportional to 31,639.82, 43,672.10 and 18,220.55

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Solution

The fourth proportional to 31,639.82, 43,672.10 and 18,220.55 is: 25,149.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,639.82 : 43,672.10 = 18,220.55 : x
  2. Step 2: Convert to fraction form
    31,639.82/43,672.10 = 18,220.55/x
  3. Step 3: Cross multiply
    31,639.82x = 43,672.10 × 18,220.55
  4. Step 4: Simplify right side
    31,639.82x = 795,729,372.19
  5. Step 5: Solve for x
    x = 795,729,372.19/31,639.82
  6. Step 6: Final answer
    x = 25,149.62

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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.