Home / 20,178.97-27,860.69-12,628.35

Finding the Fourth Proportional to 20,178.97, 27,860.69 and 12,628.35

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Solution

The fourth proportional to 20,178.97, 27,860.69 and 12,628.35 is: 17,435.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.97 : 27,860.69 = 12,628.35 : x
  2. Step 2: Convert to fraction form
    20,178.97/27,860.69 = 12,628.35/x
  3. Step 3: Cross multiply
    20,178.97x = 27,860.69 × 12,628.35
  4. Step 4: Simplify right side
    20,178.97x = 351,834,576.13
  5. Step 5: Solve for x
    x = 351,834,576.13/20,178.97
  6. Step 6: Final answer
    x = 17,435.71

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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.