Home / 39,719.72-54,813.84-21,816.38

Finding the Fourth Proportional to 39,719.72, 54,813.84 and 21,816.38

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Solution

The fourth proportional to 39,719.72, 54,813.84 and 21,816.38 is: 30,106.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.72 : 54,813.84 = 21,816.38 : x
  2. Step 2: Convert to fraction form
    39,719.72/54,813.84 = 21,816.38/x
  3. Step 3: Cross multiply
    39,719.72x = 54,813.84 × 21,816.38
  4. Step 4: Simplify right side
    39,719.72x = 1,195,839,562.70
  5. Step 5: Solve for x
    x = 1,195,839,562.70/39,719.72
  6. Step 6: Final answer
    x = 30,106.95

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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.