Home / 13,772.86-20,656.90-3,909.83

Finding the Fourth Proportional to 13,772.86, 20,656.90 and 3,909.83

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Solution

The fourth proportional to 13,772.86, 20,656.90 and 3,909.83 is: 5,864.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.86 : 20,656.90 = 3,909.83 : x
  2. Step 2: Convert to fraction form
    13,772.86/20,656.90 = 3,909.83/x
  3. Step 3: Cross multiply
    13,772.86x = 20,656.90 × 3,909.83
  4. Step 4: Simplify right side
    13,772.86x = 80,765,003.18
  5. Step 5: Solve for x
    x = 80,765,003.18/13,772.86
  6. Step 6: Final answer
    x = 5,864.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.