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Finding the Fourth Proportional to 38,958.80, 53,764.71 and 21,963.68

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Solution

The fourth proportional to 38,958.80, 53,764.71 and 21,963.68 is: 30,310.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,958.80 : 53,764.71 = 21,963.68 : x
  2. Step 2: Convert to fraction form
    38,958.80/53,764.71 = 21,963.68/x
  3. Step 3: Cross multiply
    38,958.80x = 53,764.71 × 21,963.68
  4. Step 4: Simplify right side
    38,958.80x = 1,180,870,616.91
  5. Step 5: Solve for x
    x = 1,180,870,616.91/38,958.80
  6. Step 6: Final answer
    x = 30,310.75

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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.