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Finding the Fourth Proportional to 9,514.40, 14,255.40 and 8,121.20

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Solution

The fourth proportional to 9,514.40, 14,255.40 and 8,121.20 is: 12,167.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,514.40 : 14,255.40 = 8,121.20 : x
  2. Step 2: Convert to fraction form
    9,514.40/14,255.40 = 8,121.20/x
  3. Step 3: Cross multiply
    9,514.40x = 14,255.40 × 8,121.20
  4. Step 4: Simplify right side
    9,514.40x = 115,770,954.48
  5. Step 5: Solve for x
    x = 115,770,954.48/9,514.40
  6. Step 6: Final answer
    x = 12,167.97

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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.