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Finding the Fourth Proportional to 18,884.29, 28,307.30 and 11,869.26

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Solution

The fourth proportional to 18,884.29, 28,307.30 and 11,869.26 is: 17,791.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.29 : 28,307.30 = 11,869.26 : x
  2. Step 2: Convert to fraction form
    18,884.29/28,307.30 = 11,869.26/x
  3. Step 3: Cross multiply
    18,884.29x = 28,307.30 × 11,869.26
  4. Step 4: Simplify right side
    18,884.29x = 335,986,651.10
  5. Step 5: Solve for x
    x = 335,986,651.10/18,884.29
  6. Step 6: Final answer
    x = 17,791.86

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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.