Home / 21,939.88-30,277.06-11,868.30

Finding the Fourth Proportional to 21,939.88, 30,277.06 and 11,868.30

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Solution

The fourth proportional to 21,939.88, 30,277.06 and 11,868.30 is: 16,378.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.88 : 30,277.06 = 11,868.30 : x
  2. Step 2: Convert to fraction form
    21,939.88/30,277.06 = 11,868.30/x
  3. Step 3: Cross multiply
    21,939.88x = 30,277.06 × 11,868.30
  4. Step 4: Simplify right side
    21,939.88x = 359,337,231.20
  5. Step 5: Solve for x
    x = 359,337,231.20/21,939.88
  6. Step 6: Final answer
    x = 16,378.27

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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.