Home / 20,936.88-28,904.85-13,872.87

Finding the Fourth Proportional to 20,936.88, 28,904.85 and 13,872.87

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Solution

The fourth proportional to 20,936.88, 28,904.85 and 13,872.87 is: 19,152.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.88 : 28,904.85 = 13,872.87 : x
  2. Step 2: Convert to fraction form
    20,936.88/28,904.85 = 13,872.87/x
  3. Step 3: Cross multiply
    20,936.88x = 28,904.85 × 13,872.87
  4. Step 4: Simplify right side
    20,936.88x = 400,993,226.42
  5. Step 5: Solve for x
    x = 400,993,226.42/20,936.88
  6. Step 6: Final answer
    x = 19,152.48

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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.