Home / 39,719.79-54,813.30-21,814.80

Finding the Fourth Proportional to 39,719.79, 54,813.30 and 21,814.80

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Solution

The fourth proportional to 39,719.79, 54,813.30 and 21,814.80 is: 30,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.79 : 54,813.30 = 21,814.80 : x
  2. Step 2: Convert to fraction form
    39,719.79/54,813.30 = 21,814.80/x
  3. Step 3: Cross multiply
    39,719.79x = 54,813.30 × 21,814.80
  4. Step 4: Simplify right side
    39,719.79x = 1,195,741,176.84
  5. Step 5: Solve for x
    x = 1,195,741,176.84/39,719.79
  6. Step 6: Final answer
    x = 30,104.42

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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.