Home / 39,679.87-54,758.06-21,775.17

Finding the Fourth Proportional to 39,679.87, 54,758.06 and 21,775.17

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Solution

The fourth proportional to 39,679.87, 54,758.06 and 21,775.17 is: 30,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.87 : 54,758.06 = 21,775.17 : x
  2. Step 2: Convert to fraction form
    39,679.87/54,758.06 = 21,775.17/x
  3. Step 3: Cross multiply
    39,679.87x = 54,758.06 × 21,775.17
  4. Step 4: Simplify right side
    39,679.87x = 1,192,366,243.49
  5. Step 5: Solve for x
    x = 1,192,366,243.49/39,679.87
  6. Step 6: Final answer
    x = 30,049.65

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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.