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Finding the Fourth Proportional to 17,651.11, 26,485.90 and 7,123.75

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Solution

The fourth proportional to 17,651.11, 26,485.90 and 7,123.75 is: 10,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,651.11 : 26,485.90 = 7,123.75 : x
  2. Step 2: Convert to fraction form
    17,651.11/26,485.90 = 7,123.75/x
  3. Step 3: Cross multiply
    17,651.11x = 26,485.90 × 7,123.75
  4. Step 4: Simplify right side
    17,651.11x = 188,678,930.13
  5. Step 5: Solve for x
    x = 188,678,930.13/17,651.11
  6. Step 6: Final answer
    x = 10,689.35

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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.