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Finding the Fourth Proportional to 18,701.27, 28,061.01 and 7,615.61

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Solution

The fourth proportional to 18,701.27, 28,061.01 and 7,615.61 is: 11,427.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.27 : 28,061.01 = 7,615.61 : x
  2. Step 2: Convert to fraction form
    18,701.27/28,061.01 = 7,615.61/x
  3. Step 3: Cross multiply
    18,701.27x = 28,061.01 × 7,615.61
  4. Step 4: Simplify right side
    18,701.27x = 213,701,708.37
  5. Step 5: Solve for x
    x = 213,701,708.37/18,701.27
  6. Step 6: Final answer
    x = 11,427.12

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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.