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Finding the Fourth Proportional to 18,540.64, 27,808.80 and 7,446.88

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Solution

The fourth proportional to 18,540.64, 27,808.80 and 7,446.88 is: 11,169.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,540.64 : 27,808.80 = 7,446.88 : x
  2. Step 2: Convert to fraction form
    18,540.64/27,808.80 = 7,446.88/x
  3. Step 3: Cross multiply
    18,540.64x = 27,808.80 × 7,446.88
  4. Step 4: Simplify right side
    18,540.64x = 207,088,796.54
  5. Step 5: Solve for x
    x = 207,088,796.54/18,540.64
  6. Step 6: Final answer
    x = 11,169.45

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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.