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Finding the Fourth Proportional to 8,178.56, 11,287.89 and 4,821.18

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Solution

The fourth proportional to 8,178.56, 11,287.89 and 4,821.18 is: 6,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.56 : 11,287.89 = 4,821.18 : x
  2. Step 2: Convert to fraction form
    8,178.56/11,287.89 = 4,821.18/x
  3. Step 3: Cross multiply
    8,178.56x = 11,287.89 × 4,821.18
  4. Step 4: Simplify right side
    8,178.56x = 54,420,949.51
  5. Step 5: Solve for x
    x = 54,420,949.51/8,178.56
  6. Step 6: Final answer
    x = 6,654.10

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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.