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Finding the Fourth Proportional to 8,959.82, 12,336.30 and 8,129.45

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Solution

The fourth proportional to 8,959.82, 12,336.30 and 8,129.45 is: 11,193.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.82 : 12,336.30 = 8,129.45 : x
  2. Step 2: Convert to fraction form
    8,959.82/12,336.30 = 8,129.45/x
  3. Step 3: Cross multiply
    8,959.82x = 12,336.30 × 8,129.45
  4. Step 4: Simplify right side
    8,959.82x = 100,287,272.35
  5. Step 5: Solve for x
    x = 100,287,272.35/8,959.82
  6. Step 6: Final answer
    x = 11,193.01

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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.