Home / 20,242.78-27,935.07-11,290.05

Finding the Fourth Proportional to 20,242.78, 27,935.07 and 11,290.05

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Solution

The fourth proportional to 20,242.78, 27,935.07 and 11,290.05 is: 15,580.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.78 : 27,935.07 = 11,290.05 : x
  2. Step 2: Convert to fraction form
    20,242.78/27,935.07 = 11,290.05/x
  3. Step 3: Cross multiply
    20,242.78x = 27,935.07 × 11,290.05
  4. Step 4: Simplify right side
    20,242.78x = 315,388,344.47
  5. Step 5: Solve for x
    x = 315,388,344.47/20,242.78
  6. Step 6: Final answer
    x = 15,580.29

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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.