Home / 20,997.16-28,973.82-11,565.16

Finding the Fourth Proportional to 20,997.16, 28,973.82 and 11,565.16

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Solution

The fourth proportional to 20,997.16, 28,973.82 and 11,565.16 is: 15,958.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.16 : 28,973.82 = 11,565.16 : x
  2. Step 2: Convert to fraction form
    20,997.16/28,973.82 = 11,565.16/x
  3. Step 3: Cross multiply
    20,997.16x = 28,973.82 × 11,565.16
  4. Step 4: Simplify right side
    20,997.16x = 335,086,864.11
  5. Step 5: Solve for x
    x = 335,086,864.11/20,997.16
  6. Step 6: Final answer
    x = 15,958.68

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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.