Home / 31,585.18-47,380.29-18,438.88

Finding the Fourth Proportional to 31,585.18, 47,380.29 and 18,438.88

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Solution

The fourth proportional to 31,585.18, 47,380.29 and 18,438.88 is: 27,659.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,585.18 : 47,380.29 = 18,438.88 : x
  2. Step 2: Convert to fraction form
    31,585.18/47,380.29 = 18,438.88/x
  3. Step 3: Cross multiply
    31,585.18x = 47,380.29 × 18,438.88
  4. Step 4: Simplify right side
    31,585.18x = 873,639,481.68
  5. Step 5: Solve for x
    x = 873,639,481.68/31,585.18
  6. Step 6: Final answer
    x = 27,659.79

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1.5x scale

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.