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Finding the Fourth Proportional to 27,378.78, 41,068.20 and 8,910.78

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Solution

The fourth proportional to 27,378.78, 41,068.20 and 8,910.78 is: 13,366.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,378.78 : 41,068.20 = 8,910.78 : x
  2. Step 2: Convert to fraction form
    27,378.78/41,068.20 = 8,910.78/x
  3. Step 3: Cross multiply
    27,378.78x = 41,068.20 × 8,910.78
  4. Step 4: Simplify right side
    27,378.78x = 365,949,695.20
  5. Step 5: Solve for x
    x = 365,949,695.20/27,378.78
  6. Step 6: Final answer
    x = 13,366.18

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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.