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Finding the Fourth Proportional to 27,141.71, 40,679.73 and 13,986.90

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Solution

The fourth proportional to 27,141.71, 40,679.73 and 13,986.90 is: 20,963.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,141.71 : 40,679.73 = 13,986.90 : x
  2. Step 2: Convert to fraction form
    27,141.71/40,679.73 = 13,986.90/x
  3. Step 3: Cross multiply
    27,141.71x = 40,679.73 × 13,986.90
  4. Step 4: Simplify right side
    27,141.71x = 568,983,315.54
  5. Step 5: Solve for x
    x = 568,983,315.54/27,141.71
  6. Step 6: Final answer
    x = 20,963.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.