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Finding the Fourth Proportional to 18,568.80, 27,854.64 and 5,420.88

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Solution

The fourth proportional to 18,568.80, 27,854.64 and 5,420.88 is: 8,131.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,568.80 : 27,854.64 = 5,420.88 : x
  2. Step 2: Convert to fraction form
    18,568.80/27,854.64 = 5,420.88/x
  3. Step 3: Cross multiply
    18,568.80x = 27,854.64 × 5,420.88
  4. Step 4: Simplify right side
    18,568.80x = 150,996,660.88
  5. Step 5: Solve for x
    x = 150,996,660.88/18,568.80
  6. Step 6: Final answer
    x = 8,131.74

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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.