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Finding the Fourth Proportional to 18,745.18, 28,103.88 and 11,347.89

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Solution

The fourth proportional to 18,745.18, 28,103.88 and 11,347.89 is: 17,013.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.18 : 28,103.88 = 11,347.89 : x
  2. Step 2: Convert to fraction form
    18,745.18/28,103.88 = 11,347.89/x
  3. Step 3: Cross multiply
    18,745.18x = 28,103.88 × 11,347.89
  4. Step 4: Simplify right side
    18,745.18x = 318,919,834.06
  5. Step 5: Solve for x
    x = 318,919,834.06/18,745.18
  6. Step 6: Final answer
    x = 17,013.43

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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.