Home / 20,817.14-28,727.66-11,385.70

Finding the Fourth Proportional to 20,817.14, 28,727.66 and 11,385.70

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Solution

The fourth proportional to 20,817.14, 28,727.66 and 11,385.70 is: 15,712.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.14 : 28,727.66 = 11,385.70 : x
  2. Step 2: Convert to fraction form
    20,817.14/28,727.66 = 11,385.70/x
  3. Step 3: Cross multiply
    20,817.14x = 28,727.66 × 11,385.70
  4. Step 4: Simplify right side
    20,817.14x = 327,084,475.11
  5. Step 5: Solve for x
    x = 327,084,475.11/20,817.14
  6. Step 6: Final answer
    x = 15,712.27

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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.