Home / 31,863.21-47,766.87-12,128.64

Finding the Fourth Proportional to 31,863.21, 47,766.87 and 12,128.64

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Solution

The fourth proportional to 31,863.21, 47,766.87 and 12,128.64 is: 18,182.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,863.21 : 47,766.87 = 12,128.64 : x
  2. Step 2: Convert to fraction form
    31,863.21/47,766.87 = 12,128.64/x
  3. Step 3: Cross multiply
    31,863.21x = 47,766.87 × 12,128.64
  4. Step 4: Simplify right side
    31,863.21x = 579,347,170.16
  5. Step 5: Solve for x
    x = 579,347,170.16/31,863.21
  6. Step 6: Final answer
    x = 18,182.32

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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.