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Finding the Fourth Proportional to 18,844.21, 28,266.91 and 9,479.12

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Solution

The fourth proportional to 18,844.21, 28,266.91 and 9,479.12 is: 14,218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,844.21 : 28,266.91 = 9,479.12 : x
  2. Step 2: Convert to fraction form
    18,844.21/28,266.91 = 9,479.12/x
  3. Step 3: Cross multiply
    18,844.21x = 28,266.91 × 9,479.12
  4. Step 4: Simplify right side
    18,844.21x = 267,945,266.89
  5. Step 5: Solve for x
    x = 267,945,266.89/18,844.21
  6. Step 6: Final answer
    x = 14,218.97

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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.