Home / 19,687.79-27,178.83-13,642.61

Finding the Fourth Proportional to 19,687.79, 27,178.83 and 13,642.61

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Solution

The fourth proportional to 19,687.79, 27,178.83 and 13,642.61 is: 18,833.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.79 : 27,178.83 = 13,642.61 : x
  2. Step 2: Convert to fraction form
    19,687.79/27,178.83 = 13,642.61/x
  3. Step 3: Cross multiply
    19,687.79x = 27,178.83 × 13,642.61
  4. Step 4: Simplify right side
    19,687.79x = 370,790,042.05
  5. Step 5: Solve for x
    x = 370,790,042.05/19,687.79
  6. Step 6: Final answer
    x = 18,833.51

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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.