Home / 21,984.45-30,338.66-11,912.91

Finding the Fourth Proportional to 21,984.45, 30,338.66 and 11,912.91

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Solution

The fourth proportional to 21,984.45, 30,338.66 and 11,912.91 is: 16,439.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.45 : 30,338.66 = 11,912.91 : x
  2. Step 2: Convert to fraction form
    21,984.45/30,338.66 = 11,912.91/x
  3. Step 3: Cross multiply
    21,984.45x = 30,338.66 × 11,912.91
  4. Step 4: Simplify right side
    21,984.45x = 361,421,666.54
  5. Step 5: Solve for x
    x = 361,421,666.54/21,984.45
  6. Step 6: Final answer
    x = 16,439.88

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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.