Home / 21,936.74-30,272.71-12,378.66

Finding the Fourth Proportional to 21,936.74, 30,272.71 and 12,378.66

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Solution

The fourth proportional to 21,936.74, 30,272.71 and 12,378.66 is: 17,082.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.74 : 30,272.71 = 12,378.66 : x
  2. Step 2: Convert to fraction form
    21,936.74/30,272.71 = 12,378.66/x
  3. Step 3: Cross multiply
    21,936.74x = 30,272.71 × 12,378.66
  4. Step 4: Simplify right side
    21,936.74x = 374,735,584.37
  5. Step 5: Solve for x
    x = 374,735,584.37/21,936.74
  6. Step 6: Final answer
    x = 17,082.56

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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.