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Finding the Fourth Proportional to 8,755.72, 13,129.20 and 2,910.28

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Solution

The fourth proportional to 8,755.72, 13,129.20 and 2,910.28 is: 4,363.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,755.72 : 13,129.20 = 2,910.28 : x
  2. Step 2: Convert to fraction form
    8,755.72/13,129.20 = 2,910.28/x
  3. Step 3: Cross multiply
    8,755.72x = 13,129.20 × 2,910.28
  4. Step 4: Simplify right side
    8,755.72x = 38,209,648.18
  5. Step 5: Solve for x
    x = 38,209,648.18/8,755.72
  6. Step 6: Final answer
    x = 4,363.96

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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.