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Finding the Fourth Proportional to 8,278.80, 12,418.20 and 4,998.30

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Solution

The fourth proportional to 8,278.80, 12,418.20 and 4,998.30 is: 7,497.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.80 : 12,418.20 = 4,998.30 : x
  2. Step 2: Convert to fraction form
    8,278.80/12,418.20 = 4,998.30/x
  3. Step 3: Cross multiply
    8,278.80x = 12,418.20 × 4,998.30
  4. Step 4: Simplify right side
    8,278.80x = 62,069,889.06
  5. Step 5: Solve for x
    x = 62,069,889.06/8,278.80
  6. Step 6: Final answer
    x = 7,497.45

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Half scale
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Double scale
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Similar ratio
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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.