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Finding the Fourth Proportional to 13,170.22, 18,174.86 and 7,868.14

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Solution

The fourth proportional to 13,170.22, 18,174.86 and 7,868.14 is: 10,858.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.22 : 18,174.86 = 7,868.14 : x
  2. Step 2: Convert to fraction form
    13,170.22/18,174.86 = 7,868.14/x
  3. Step 3: Cross multiply
    13,170.22x = 18,174.86 × 7,868.14
  4. Step 4: Simplify right side
    13,170.22x = 143,002,342.96
  5. Step 5: Solve for x
    x = 143,002,342.96/13,170.22
  6. Step 6: Final answer
    x = 10,858.01

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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.