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Finding the Fourth Proportional to 8,906.08, 12,290.52 and 5,180.08

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Solution

The fourth proportional to 8,906.08, 12,290.52 and 5,180.08 is: 7,148.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.08 : 12,290.52 = 5,180.08 : x
  2. Step 2: Convert to fraction form
    8,906.08/12,290.52 = 5,180.08/x
  3. Step 3: Cross multiply
    8,906.08x = 12,290.52 × 5,180.08
  4. Step 4: Simplify right side
    8,906.08x = 63,665,876.84
  5. Step 5: Solve for x
    x = 63,665,876.84/8,906.08
  6. Step 6: Final answer
    x = 7,148.59

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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.