Home / 20,243.12-27,935.36-11,290.72

Finding the Fourth Proportional to 20,243.12, 27,935.36 and 11,290.72

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Solution

The fourth proportional to 20,243.12, 27,935.36 and 11,290.72 is: 15,581.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,243.12 : 27,935.36 = 11,290.72 : x
  2. Step 2: Convert to fraction form
    20,243.12/27,935.36 = 11,290.72/x
  3. Step 3: Cross multiply
    20,243.12x = 27,935.36 × 11,290.72
  4. Step 4: Simplify right side
    20,243.12x = 315,410,327.86
  5. Step 5: Solve for x
    x = 315,410,327.86/20,243.12
  6. Step 6: Final answer
    x = 15,581.11

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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.