Home / 5,419.86-8,126.88-2,786.28

Finding the Fourth Proportional to 5,419.86, 8,126.88 and 2,786.28

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Solution

The fourth proportional to 5,419.86, 8,126.88 and 2,786.28 is: 4,177.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.86 : 8,126.88 = 2,786.28 : x
  2. Step 2: Convert to fraction form
    5,419.86/8,126.88 = 2,786.28/x
  3. Step 3: Cross multiply
    5,419.86x = 8,126.88 × 2,786.28
  4. Step 4: Simplify right side
    5,419.86x = 22,643,763.21
  5. Step 5: Solve for x
    x = 22,643,763.21/5,419.86
  6. Step 6: Final answer
    x = 4,177.92

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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.