Home / 20,128.05-27,775.45-11,175.02

Finding the Fourth Proportional to 20,128.05, 27,775.45 and 11,175.02

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Solution

The fourth proportional to 20,128.05, 27,775.45 and 11,175.02 is: 15,420.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.05 : 27,775.45 = 11,175.02 : x
  2. Step 2: Convert to fraction form
    20,128.05/27,775.45 = 11,175.02/x
  3. Step 3: Cross multiply
    20,128.05x = 27,775.45 × 11,175.02
  4. Step 4: Simplify right side
    20,128.05x = 310,391,209.26
  5. Step 5: Solve for x
    x = 310,391,209.26/20,128.05
  6. Step 6: Final answer
    x = 15,420.83

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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.