Home / 20,828.13-28,743.02-11,396.89

Finding the Fourth Proportional to 20,828.13, 28,743.02 and 11,396.89

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Solution

The fourth proportional to 20,828.13, 28,743.02 and 11,396.89 is: 15,727.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.13 : 28,743.02 = 11,396.89 : x
  2. Step 2: Convert to fraction form
    20,828.13/28,743.02 = 11,396.89/x
  3. Step 3: Cross multiply
    20,828.13x = 28,743.02 × 11,396.89
  4. Step 4: Simplify right side
    20,828.13x = 327,581,037.21
  5. Step 5: Solve for x
    x = 327,581,037.21/20,828.13
  6. Step 6: Final answer
    x = 15,727.82

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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.