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Finding the Fourth Proportional to 8,755, 12,081.90 and 5,615.44

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Solution

The fourth proportional to 8,755, 12,081.90 and 5,615.44 is: 7,749.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,755 : 12,081.90 = 5,615.44 : x
  2. Step 2: Convert to fraction form
    8,755/12,081.90 = 5,615.44/x
  3. Step 3: Cross multiply
    8,755x = 12,081.90 × 5,615.44
  4. Step 4: Simplify right side
    8,755x = 67,845,184.54
  5. Step 5: Solve for x
    x = 67,845,184.54/8,755
  6. Step 6: Final answer
    x = 7,749.31

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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.