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Finding the Fourth Proportional to 13,171.91, 19,740.44 and 6,919.14

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Solution

The fourth proportional to 13,171.91, 19,740.44 and 6,919.14 is: 10,369.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.91 : 19,740.44 = 6,919.14 : x
  2. Step 2: Convert to fraction form
    13,171.91/19,740.44 = 6,919.14/x
  3. Step 3: Cross multiply
    13,171.91x = 19,740.44 × 6,919.14
  4. Step 4: Simplify right side
    13,171.91x = 136,586,868.02
  5. Step 5: Solve for x
    x = 136,586,868.02/13,171.91
  6. Step 6: Final answer
    x = 10,369.56

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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.