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Finding the Fourth Proportional to 9,398.80, 12,976.68 and 8,400.88

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Solution

The fourth proportional to 9,398.80, 12,976.68 and 8,400.88 is: 11,598.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,398.80 : 12,976.68 = 8,400.88 : x
  2. Step 2: Convert to fraction form
    9,398.80/12,976.68 = 8,400.88/x
  3. Step 3: Cross multiply
    9,398.80x = 12,976.68 × 8,400.88
  4. Step 4: Simplify right side
    9,398.80x = 109,015,531.48
  5. Step 5: Solve for x
    x = 109,015,531.48/9,398.80
  6. Step 6: Final answer
    x = 11,598.88

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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.