Home / 20,565.36-28,380.24-11,133.90

Finding the Fourth Proportional to 20,565.36, 28,380.24 and 11,133.90

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Solution

The fourth proportional to 20,565.36, 28,380.24 and 11,133.90 is: 15,364.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.36 : 28,380.24 = 11,133.90 : x
  2. Step 2: Convert to fraction form
    20,565.36/28,380.24 = 11,133.90/x
  3. Step 3: Cross multiply
    20,565.36x = 28,380.24 × 11,133.90
  4. Step 4: Simplify right side
    20,565.36x = 315,982,754.14
  5. Step 5: Solve for x
    x = 315,982,754.14/20,565.36
  6. Step 6: Final answer
    x = 15,364.81

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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.