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Finding the Fourth Proportional to 18,843.74, 28,266.21 and 9,478.64

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Solution

The fourth proportional to 18,843.74, 28,266.21 and 9,478.64 is: 14,218.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.74 : 28,266.21 = 9,478.64 : x
  2. Step 2: Convert to fraction form
    18,843.74/28,266.21 = 9,478.64/x
  3. Step 3: Cross multiply
    18,843.74x = 28,266.21 × 9,478.64
  4. Step 4: Simplify right side
    18,843.74x = 267,925,299.42
  5. Step 5: Solve for x
    x = 267,925,299.42/18,843.74
  6. Step 6: Final answer
    x = 14,218.27

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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.