Home / 28,286.63-39,036.76-15,711.38

Finding the Fourth Proportional to 28,286.63, 39,036.76 and 15,711.38

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Solution

The fourth proportional to 28,286.63, 39,036.76 and 15,711.38 is: 21,682.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.63 : 39,036.76 = 15,711.38 : x
  2. Step 2: Convert to fraction form
    28,286.63/39,036.76 = 15,711.38/x
  3. Step 3: Cross multiply
    28,286.63x = 39,036.76 × 15,711.38
  4. Step 4: Simplify right side
    28,286.63x = 613,321,135.87
  5. Step 5: Solve for x
    x = 613,321,135.87/28,286.63
  6. Step 6: Final answer
    x = 21,682.37

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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.