Home / 12,640.44-17,439.60-8,167.20

Finding the Fourth Proportional to 12,640.44, 17,439.60 and 8,167.20

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Solution

The fourth proportional to 12,640.44, 17,439.60 and 8,167.20 is: 11,268.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.44 : 17,439.60 = 8,167.20 : x
  2. Step 2: Convert to fraction form
    12,640.44/17,439.60 = 8,167.20/x
  3. Step 3: Cross multiply
    12,640.44x = 17,439.60 × 8,167.20
  4. Step 4: Simplify right side
    12,640.44x = 142,432,701.12
  5. Step 5: Solve for x
    x = 142,432,701.12/12,640.44
  6. Step 6: Final answer
    x = 11,268.02

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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.