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Finding the Fourth Proportional to 11,512.40, 17,268.60 and 8,013.20

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Solution

The fourth proportional to 11,512.40, 17,268.60 and 8,013.20 is: 12,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.40 : 17,268.60 = 8,013.20 : x
  2. Step 2: Convert to fraction form
    11,512.40/17,268.60 = 8,013.20/x
  3. Step 3: Cross multiply
    11,512.40x = 17,268.60 × 8,013.20
  4. Step 4: Simplify right side
    11,512.40x = 138,376,745.52
  5. Step 5: Solve for x
    x = 138,376,745.52/11,512.40
  6. Step 6: Final answer
    x = 12,019.80

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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.