Home / 20,126.97-27,775.32-12,577.69

Finding the Fourth Proportional to 20,126.97, 27,775.32 and 12,577.69

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Solution

The fourth proportional to 20,126.97, 27,775.32 and 12,577.69 is: 17,357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.97 : 27,775.32 = 12,577.69 : x
  2. Step 2: Convert to fraction form
    20,126.97/27,775.32 = 12,577.69/x
  3. Step 3: Cross multiply
    20,126.97x = 27,775.32 × 12,577.69
  4. Step 4: Simplify right side
    20,126.97x = 349,349,162.85
  5. Step 5: Solve for x
    x = 349,349,162.85/20,126.97
  6. Step 6: Final answer
    x = 17,357.27

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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.