Home / 19,639.78-27,103.18-10,687.29

Finding the Fourth Proportional to 19,639.78, 27,103.18 and 10,687.29

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Solution

The fourth proportional to 19,639.78, 27,103.18 and 10,687.29 is: 14,748.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.78 : 27,103.18 = 10,687.29 : x
  2. Step 2: Convert to fraction form
    19,639.78/27,103.18 = 10,687.29/x
  3. Step 3: Cross multiply
    19,639.78x = 27,103.18 × 10,687.29
  4. Step 4: Simplify right side
    19,639.78x = 289,659,544.58
  5. Step 5: Solve for x
    x = 289,659,544.58/19,639.78
  6. Step 6: Final answer
    x = 14,748.61

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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.