Home / 20,562.49-28,376.20-11,131.09

Finding the Fourth Proportional to 20,562.49, 28,376.20 and 11,131.09

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Solution

The fourth proportional to 20,562.49, 28,376.20 and 11,131.09 is: 15,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.49 : 28,376.20 = 11,131.09 : x
  2. Step 2: Convert to fraction form
    20,562.49/28,376.20 = 11,131.09/x
  3. Step 3: Cross multiply
    20,562.49x = 28,376.20 × 11,131.09
  4. Step 4: Simplify right side
    20,562.49x = 315,858,036.06
  5. Step 5: Solve for x
    x = 315,858,036.06/20,562.49
  6. Step 6: Final answer
    x = 15,360.88

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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.