Home / 20,817.40-28,728.12-11,257.27

Finding the Fourth Proportional to 20,817.40, 28,728.12 and 11,257.27

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Solution

The fourth proportional to 20,817.40, 28,728.12 and 11,257.27 is: 15,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.40 : 28,728.12 = 11,257.27 : x
  2. Step 2: Convert to fraction form
    20,817.40/28,728.12 = 11,257.27/x
  3. Step 3: Cross multiply
    20,817.40x = 28,728.12 × 11,257.27
  4. Step 4: Simplify right side
    20,817.40x = 323,400,203.43
  5. Step 5: Solve for x
    x = 323,400,203.43/20,817.40
  6. Step 6: Final answer
    x = 15,535.09

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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.