Home / 21,868.75-30,178.89-11,932.75

Finding the Fourth Proportional to 21,868.75, 30,178.89 and 11,932.75

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Solution

The fourth proportional to 21,868.75, 30,178.89 and 11,932.75 is: 16,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.75 : 30,178.89 = 11,932.75 : x
  2. Step 2: Convert to fraction form
    21,868.75/30,178.89 = 11,932.75/x
  3. Step 3: Cross multiply
    21,868.75x = 30,178.89 × 11,932.75
  4. Step 4: Simplify right side
    21,868.75x = 360,117,149.65
  5. Step 5: Solve for x
    x = 360,117,149.65/21,868.75
  6. Step 6: Final answer
    x = 16,467.20

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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.