Home / 20,832-28,748.43-11,400.36

Finding the Fourth Proportional to 20,832, 28,748.43 and 11,400.36

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Solution

The fourth proportional to 20,832, 28,748.43 and 11,400.36 is: 15,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832 : 28,748.43 = 11,400.36 : x
  2. Step 2: Convert to fraction form
    20,832/28,748.43 = 11,400.36/x
  3. Step 3: Cross multiply
    20,832x = 28,748.43 × 11,400.36
  4. Step 4: Simplify right side
    20,832x = 327,742,451.43
  5. Step 5: Solve for x
    x = 327,742,451.43/20,832
  6. Step 6: Final answer
    x = 15,732.64

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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.