Home / 28,213.85-38,936.39-16,115.40

Finding the Fourth Proportional to 28,213.85, 38,936.39 and 16,115.40

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Solution

The fourth proportional to 28,213.85, 38,936.39 and 16,115.40 is: 22,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.85 : 38,936.39 = 16,115.40 : x
  2. Step 2: Convert to fraction form
    28,213.85/38,936.39 = 16,115.40/x
  3. Step 3: Cross multiply
    28,213.85x = 38,936.39 × 16,115.40
  4. Step 4: Simplify right side
    28,213.85x = 627,475,418.83
  5. Step 5: Solve for x
    x = 627,475,418.83/28,213.85
  6. Step 6: Final answer
    x = 22,239.98

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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.