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Finding the Fourth Proportional to 8,255.20, 12,400.08 and 6,959.20

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Solution

The fourth proportional to 8,255.20, 12,400.08 and 6,959.20 is: 10,453.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,255.20 : 12,400.08 = 6,959.20 : x
  2. Step 2: Convert to fraction form
    8,255.20/12,400.08 = 6,959.20/x
  3. Step 3: Cross multiply
    8,255.20x = 12,400.08 × 6,959.20
  4. Step 4: Simplify right side
    8,255.20x = 86,294,636.74
  5. Step 5: Solve for x
    x = 86,294,636.74/8,255.20
  6. Step 6: Final answer
    x = 10,453.37

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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.