Home / 39,845.91-54,987.35-21,940.88

Finding the Fourth Proportional to 39,845.91, 54,987.35 and 21,940.88

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Solution

The fourth proportional to 39,845.91, 54,987.35 and 21,940.88 is: 30,278.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,845.91 : 54,987.35 = 21,940.88 : x
  2. Step 2: Convert to fraction form
    39,845.91/54,987.35 = 21,940.88/x
  3. Step 3: Cross multiply
    39,845.91x = 54,987.35 × 21,940.88
  4. Step 4: Simplify right side
    39,845.91x = 1,206,470,463.23
  5. Step 5: Solve for x
    x = 1,206,470,463.23/39,845.91
  6. Step 6: Final answer
    x = 30,278.40

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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.