Home / 5,419.71-8,130.87-2,786.13

Finding the Fourth Proportional to 5,419.71, 8,130.87 and 2,786.13

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Solution

The fourth proportional to 5,419.71, 8,130.87 and 2,786.13 is: 4,179.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.71 : 8,130.87 = 2,786.13 : x
  2. Step 2: Convert to fraction form
    5,419.71/8,130.87 = 2,786.13/x
  3. Step 3: Cross multiply
    5,419.71x = 8,130.87 × 2,786.13
  4. Step 4: Simplify right side
    5,419.71x = 22,653,660.83
  5. Step 5: Solve for x
    x = 22,653,660.83/5,419.71
  6. Step 6: Final answer
    x = 4,179.87

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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.