Home / 20,565.41-28,380.36-11,133.98

Finding the Fourth Proportional to 20,565.41, 28,380.36 and 11,133.98

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Solution

The fourth proportional to 20,565.41, 28,380.36 and 11,133.98 is: 15,364.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.41 : 28,380.36 = 11,133.98 : x
  2. Step 2: Convert to fraction form
    20,565.41/28,380.36 = 11,133.98/x
  3. Step 3: Cross multiply
    20,565.41x = 28,380.36 × 11,133.98
  4. Step 4: Simplify right side
    20,565.41x = 315,986,218.73
  5. Step 5: Solve for x
    x = 315,986,218.73/20,565.41
  6. Step 6: Final answer
    x = 15,364.94

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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.