Home / 20,240.45-27,931.77-11,287.97

Finding the Fourth Proportional to 20,240.45, 27,931.77 and 11,287.97

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Solution

The fourth proportional to 20,240.45, 27,931.77 and 11,287.97 is: 15,577.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.45 : 27,931.77 = 11,287.97 : x
  2. Step 2: Convert to fraction form
    20,240.45/27,931.77 = 11,287.97/x
  3. Step 3: Cross multiply
    20,240.45x = 27,931.77 × 11,287.97
  4. Step 4: Simplify right side
    20,240.45x = 315,292,842.15
  5. Step 5: Solve for x
    x = 315,292,842.15/20,240.45
  6. Step 6: Final answer
    x = 15,577.36

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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.