Home / 20,105.40-27,747.06-11,155.68

Finding the Fourth Proportional to 20,105.40, 27,747.06 and 11,155.68

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Solution

The fourth proportional to 20,105.40, 27,747.06 and 11,155.68 is: 15,395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.40 : 27,747.06 = 11,155.68 : x
  2. Step 2: Convert to fraction form
    20,105.40/27,747.06 = 11,155.68/x
  3. Step 3: Cross multiply
    20,105.40x = 27,747.06 × 11,155.68
  4. Step 4: Simplify right side
    20,105.40x = 309,537,322.30
  5. Step 5: Solve for x
    x = 309,537,322.30/20,105.40
  6. Step 6: Final answer
    x = 15,395.73

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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.