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Finding the Fourth Proportional to 17,701.80, 26,552.70 and 12,172.20

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Solution

The fourth proportional to 17,701.80, 26,552.70 and 12,172.20 is: 18,258.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,701.80 : 26,552.70 = 12,172.20 : x
  2. Step 2: Convert to fraction form
    17,701.80/26,552.70 = 12,172.20/x
  3. Step 3: Cross multiply
    17,701.80x = 26,552.70 × 12,172.20
  4. Step 4: Simplify right side
    17,701.80x = 323,204,774.94
  5. Step 5: Solve for x
    x = 323,204,774.94/17,701.80
  6. Step 6: Final answer
    x = 18,258.30

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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.