Home / 39,628.49-54,689.87-21,723.54

Finding the Fourth Proportional to 39,628.49, 54,689.87 and 21,723.54

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Solution

The fourth proportional to 39,628.49, 54,689.87 and 21,723.54 is: 29,979.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,628.49 : 54,689.87 = 21,723.54 : x
  2. Step 2: Convert to fraction form
    39,628.49/54,689.87 = 21,723.54/x
  3. Step 3: Cross multiply
    39,628.49x = 54,689.87 × 21,723.54
  4. Step 4: Simplify right side
    39,628.49x = 1,188,057,613.20
  5. Step 5: Solve for x
    x = 1,188,057,613.20/39,628.49
  6. Step 6: Final answer
    x = 29,979.89

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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.