Home / 20,827.74-28,743.12-11,396.40

Finding the Fourth Proportional to 20,827.74, 28,743.12 and 11,396.40

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Solution

The fourth proportional to 20,827.74, 28,743.12 and 11,396.40 is: 15,727.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.74 : 28,743.12 = 11,396.40 : x
  2. Step 2: Convert to fraction form
    20,827.74/28,743.12 = 11,396.40/x
  3. Step 3: Cross multiply
    20,827.74x = 28,743.12 × 11,396.40
  4. Step 4: Simplify right side
    20,827.74x = 327,568,092.77
  5. Step 5: Solve for x
    x = 327,568,092.77/20,827.74
  6. Step 6: Final answer
    x = 15,727.49

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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.