Home / 31,863.12-47,766.73-12,128.55

Finding the Fourth Proportional to 31,863.12, 47,766.73 and 12,128.55

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Solution

The fourth proportional to 31,863.12, 47,766.73 and 12,128.55 is: 18,182.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,863.12 : 47,766.73 = 12,128.55 : x
  2. Step 2: Convert to fraction form
    31,863.12/47,766.73 = 12,128.55/x
  3. Step 3: Cross multiply
    31,863.12x = 47,766.73 × 12,128.55
  4. Step 4: Simplify right side
    31,863.12x = 579,340,986.44
  5. Step 5: Solve for x
    x = 579,340,986.44/31,863.12
  6. Step 6: Final answer
    x = 18,182.18

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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.