Home / 20,105.77-27,746.13-11,153.86

Finding the Fourth Proportional to 20,105.77, 27,746.13 and 11,153.86

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Solution

The fourth proportional to 20,105.77, 27,746.13 and 11,153.86 is: 15,392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.77 : 27,746.13 = 11,153.86 : x
  2. Step 2: Convert to fraction form
    20,105.77/27,746.13 = 11,153.86/x
  3. Step 3: Cross multiply
    20,105.77x = 27,746.13 × 11,153.86
  4. Step 4: Simplify right side
    20,105.77x = 309,476,449.56
  5. Step 5: Solve for x
    x = 309,476,449.56/20,105.77
  6. Step 6: Final answer
    x = 15,392.42

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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.