Home / 39,689.97-54,772.86-21,786.64

Finding the Fourth Proportional to 39,689.97, 54,772.86 and 21,786.64

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Solution

The fourth proportional to 39,689.97, 54,772.86 and 21,786.64 is: 30,065.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,689.97 : 54,772.86 = 21,786.64 : x
  2. Step 2: Convert to fraction form
    39,689.97/54,772.86 = 21,786.64/x
  3. Step 3: Cross multiply
    39,689.97x = 54,772.86 × 21,786.64
  4. Step 4: Simplify right side
    39,689.97x = 1,193,316,630.06
  5. Step 5: Solve for x
    x = 1,193,316,630.06/39,689.97
  6. Step 6: Final answer
    x = 30,065.95

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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.