Home / 39,748.78-54,853.28-21,843.75

Finding the Fourth Proportional to 39,748.78, 54,853.28 and 21,843.75

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Solution

The fourth proportional to 39,748.78, 54,853.28 and 21,843.75 is: 30,144.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,748.78 : 54,853.28 = 21,843.75 : x
  2. Step 2: Convert to fraction form
    39,748.78/54,853.28 = 21,843.75/x
  3. Step 3: Cross multiply
    39,748.78x = 54,853.28 × 21,843.75
  4. Step 4: Simplify right side
    39,748.78x = 1,198,201,335
  5. Step 5: Solve for x
    x = 1,198,201,335/39,748.78
  6. Step 6: Final answer
    x = 30,144.35

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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.