Home / 39,659.39-54,731.49-21,755.15

Finding the Fourth Proportional to 39,659.39, 54,731.49 and 21,755.15

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Solution

The fourth proportional to 39,659.39, 54,731.49 and 21,755.15 is: 30,022.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,659.39 : 54,731.49 = 21,755.15 : x
  2. Step 2: Convert to fraction form
    39,659.39/54,731.49 = 21,755.15/x
  3. Step 3: Cross multiply
    39,659.39x = 54,731.49 × 21,755.15
  4. Step 4: Simplify right side
    39,659.39x = 1,190,691,774.67
  5. Step 5: Solve for x
    x = 1,190,691,774.67/39,659.39
  6. Step 6: Final answer
    x = 30,022.95

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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.