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Finding the Fourth Proportional to 8,178.63, 11,287.98 and 4,821.24

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Solution

The fourth proportional to 8,178.63, 11,287.98 and 4,821.24 is: 6,654.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.63 : 11,287.98 = 4,821.24 : x
  2. Step 2: Convert to fraction form
    8,178.63/11,287.98 = 4,821.24/x
  3. Step 3: Cross multiply
    8,178.63x = 11,287.98 × 4,821.24
  4. Step 4: Simplify right side
    8,178.63x = 54,422,060.70
  5. Step 5: Solve for x
    x = 54,422,060.70/8,178.63
  6. Step 6: Final answer
    x = 6,654.18

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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.