Home / 20,687.38-28,548.58-11,255.94

Finding the Fourth Proportional to 20,687.38, 28,548.58 and 11,255.94

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Solution

The fourth proportional to 20,687.38, 28,548.58 and 11,255.94 is: 15,533.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.38 : 28,548.58 = 11,255.94 : x
  2. Step 2: Convert to fraction form
    20,687.38/28,548.58 = 11,255.94/x
  3. Step 3: Cross multiply
    20,687.38x = 28,548.58 × 11,255.94
  4. Step 4: Simplify right side
    20,687.38x = 321,341,103.57
  5. Step 5: Solve for x
    x = 321,341,103.57/20,687.38
  6. Step 6: Final answer
    x = 15,533.19

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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.