Home / 39,896.33-55,057.08-21,990.95

Finding the Fourth Proportional to 39,896.33, 55,057.08 and 21,990.95

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Solution

The fourth proportional to 39,896.33, 55,057.08 and 21,990.95 is: 30,347.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.33 : 55,057.08 = 21,990.95 : x
  2. Step 2: Convert to fraction form
    39,896.33/55,057.08 = 21,990.95/x
  3. Step 3: Cross multiply
    39,896.33x = 55,057.08 × 21,990.95
  4. Step 4: Simplify right side
    39,896.33x = 1,210,757,493.43
  5. Step 5: Solve for x
    x = 1,210,757,493.43/39,896.33
  6. Step 6: Final answer
    x = 30,347.59

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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.