Home / 39,805.38-54,929.88-21,900.06

Finding the Fourth Proportional to 39,805.38, 54,929.88 and 21,900.06

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Solution

The fourth proportional to 39,805.38, 54,929.88 and 21,900.06 is: 30,221.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,805.38 : 54,929.88 = 21,900.06 : x
  2. Step 2: Convert to fraction form
    39,805.38/54,929.88 = 21,900.06/x
  3. Step 3: Cross multiply
    39,805.38x = 54,929.88 × 21,900.06
  4. Step 4: Simplify right side
    39,805.38x = 1,202,967,667.79
  5. Step 5: Solve for x
    x = 1,202,967,667.79/39,805.38
  6. Step 6: Final answer
    x = 30,221.23

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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.