Home / 39,678.39-54,755.78-21,773.43

Finding the Fourth Proportional to 39,678.39, 54,755.78 and 21,773.43

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Solution

The fourth proportional to 39,678.39, 54,755.78 and 21,773.43 is: 30,047.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.39 : 54,755.78 = 21,773.43 : x
  2. Step 2: Convert to fraction form
    39,678.39/54,755.78 = 21,773.43/x
  3. Step 3: Cross multiply
    39,678.39x = 54,755.78 × 21,773.43
  4. Step 4: Simplify right side
    39,678.39x = 1,192,221,034.06
  5. Step 5: Solve for x
    x = 1,192,221,034.06/39,678.39
  6. Step 6: Final answer
    x = 30,047.11

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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.