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Finding the Fourth Proportional to 18,843.64, 28,257.26 and 9,477.81

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Solution

The fourth proportional to 18,843.64, 28,257.26 and 9,477.81 is: 14,212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.64 : 28,257.26 = 9,477.81 : x
  2. Step 2: Convert to fraction form
    18,843.64/28,257.26 = 9,477.81/x
  3. Step 3: Cross multiply
    18,843.64x = 28,257.26 × 9,477.81
  4. Step 4: Simplify right side
    18,843.64x = 267,816,894.01
  5. Step 5: Solve for x
    x = 267,816,894.01/18,843.64
  6. Step 6: Final answer
    x = 14,212.59

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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.