Home / 13,756.86-20,635.40-3,896.21

Finding the Fourth Proportional to 13,756.86, 20,635.40 and 3,896.21

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Solution

The fourth proportional to 13,756.86, 20,635.40 and 3,896.21 is: 5,844.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.86 : 20,635.40 = 3,896.21 : x
  2. Step 2: Convert to fraction form
    13,756.86/20,635.40 = 3,896.21/x
  3. Step 3: Cross multiply
    13,756.86x = 20,635.40 × 3,896.21
  4. Step 4: Simplify right side
    13,756.86x = 80,399,913.16
  5. Step 5: Solve for x
    x = 80,399,913.16/13,756.86
  6. Step 6: Final answer
    x = 5,844.35

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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.