Home / 20,562.89-28,376.78-11,131.44

Finding the Fourth Proportional to 20,562.89, 28,376.78 and 11,131.44

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Solution

The fourth proportional to 20,562.89, 28,376.78 and 11,131.44 is: 15,361.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.89 : 28,376.78 = 11,131.44 : x
  2. Step 2: Convert to fraction form
    20,562.89/28,376.78 = 11,131.44/x
  3. Step 3: Cross multiply
    20,562.89x = 28,376.78 × 11,131.44
  4. Step 4: Simplify right side
    20,562.89x = 315,874,368.31
  5. Step 5: Solve for x
    x = 315,874,368.31/20,562.89
  6. Step 6: Final answer
    x = 15,361.38

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Half scale
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Double scale
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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.