Home / 28,367.88-39,159.78-20,196.75

Finding the Fourth Proportional to 28,367.88, 39,159.78 and 20,196.75

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Solution

The fourth proportional to 28,367.88, 39,159.78 and 20,196.75 is: 27,880.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.88 : 39,159.78 = 20,196.75 : x
  2. Step 2: Convert to fraction form
    28,367.88/39,159.78 = 20,196.75/x
  3. Step 3: Cross multiply
    28,367.88x = 39,159.78 × 20,196.75
  4. Step 4: Simplify right side
    28,367.88x = 790,900,286.72
  5. Step 5: Solve for x
    x = 790,900,286.72/28,367.88
  6. Step 6: Final answer
    x = 27,880.13

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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.