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Finding the Fourth Proportional to 12,697.14, 17,555.50 and 11,120.72

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Solution

The fourth proportional to 12,697.14, 17,555.50 and 11,120.72 is: 15,375.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,697.14 : 17,555.50 = 11,120.72 : x
  2. Step 2: Convert to fraction form
    12,697.14/17,555.50 = 11,120.72/x
  3. Step 3: Cross multiply
    12,697.14x = 17,555.50 × 11,120.72
  4. Step 4: Simplify right side
    12,697.14x = 195,229,799.96
  5. Step 5: Solve for x
    x = 195,229,799.96/12,697.14
  6. Step 6: Final answer
    x = 15,375.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.