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Finding the Fourth Proportional to 8,805.75, 12,149.76 and 5,221.55

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Solution

The fourth proportional to 8,805.75, 12,149.76 and 5,221.55 is: 7,204.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.75 : 12,149.76 = 5,221.55 : x
  2. Step 2: Convert to fraction form
    8,805.75/12,149.76 = 5,221.55/x
  3. Step 3: Cross multiply
    8,805.75x = 12,149.76 × 5,221.55
  4. Step 4: Simplify right side
    8,805.75x = 63,440,579.33
  5. Step 5: Solve for x
    x = 63,440,579.33/8,805.75
  6. Step 6: Final answer
    x = 7,204.45

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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.