Home / 21,311.51-31,976.48-11,439.26

Finding the Fourth Proportional to 21,311.51, 31,976.48 and 11,439.26

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Solution

The fourth proportional to 21,311.51, 31,976.48 and 11,439.26 is: 17,163.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.51 : 31,976.48 = 11,439.26 : x
  2. Step 2: Convert to fraction form
    21,311.51/31,976.48 = 11,439.26/x
  3. Step 3: Cross multiply
    21,311.51x = 31,976.48 × 11,439.26
  4. Step 4: Simplify right side
    21,311.51x = 365,787,217.26
  5. Step 5: Solve for x
    x = 365,787,217.26/21,311.51
  6. Step 6: Final answer
    x = 17,163.84

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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.