Home / 20,115.36-27,758.48-12,154.64

Finding the Fourth Proportional to 20,115.36, 27,758.48 and 12,154.64

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Solution

The fourth proportional to 20,115.36, 27,758.48 and 12,154.64 is: 16,772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.36 : 27,758.48 = 12,154.64 : x
  2. Step 2: Convert to fraction form
    20,115.36/27,758.48 = 12,154.64/x
  3. Step 3: Cross multiply
    20,115.36x = 27,758.48 × 12,154.64
  4. Step 4: Simplify right side
    20,115.36x = 337,394,331.35
  5. Step 5: Solve for x
    x = 337,394,331.35/20,115.36
  6. Step 6: Final answer
    x = 16,772.97

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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.