Home / 28,286.88-39,037.13-15,711.63

Finding the Fourth Proportional to 28,286.88, 39,037.13 and 15,711.63

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Solution

The fourth proportional to 28,286.88, 39,037.13 and 15,711.63 is: 21,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.88 : 39,037.13 = 15,711.63 : x
  2. Step 2: Convert to fraction form
    28,286.88/39,037.13 = 15,711.63/x
  3. Step 3: Cross multiply
    28,286.88x = 39,037.13 × 15,711.63
  4. Step 4: Simplify right side
    28,286.88x = 613,336,942.82
  5. Step 5: Solve for x
    x = 613,336,942.82/28,286.88
  6. Step 6: Final answer
    x = 21,682.74

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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.