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Finding the Fourth Proportional to 18,723.27, 28,071.05 and 8,851.02

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Solution

The fourth proportional to 18,723.27, 28,071.05 and 8,851.02 is: 13,269.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.27 : 28,071.05 = 8,851.02 : x
  2. Step 2: Convert to fraction form
    18,723.27/28,071.05 = 8,851.02/x
  3. Step 3: Cross multiply
    18,723.27x = 28,071.05 × 8,851.02
  4. Step 4: Simplify right side
    18,723.27x = 248,457,380.72
  5. Step 5: Solve for x
    x = 248,457,380.72/18,723.27
  6. Step 6: Final answer
    x = 13,269.98

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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.