Home / 5,143.79-7,716.30-1,811.35

Finding the Fourth Proportional to 5,143.79, 7,716.30 and 1,811.35

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Solution

The fourth proportional to 5,143.79, 7,716.30 and 1,811.35 is: 2,717.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.79 : 7,716.30 = 1,811.35 : x
  2. Step 2: Convert to fraction form
    5,143.79/7,716.30 = 1,811.35/x
  3. Step 3: Cross multiply
    5,143.79x = 7,716.30 × 1,811.35
  4. Step 4: Simplify right side
    5,143.79x = 13,976,872.37
  5. Step 5: Solve for x
    x = 13,976,872.37/5,143.79
  6. Step 6: Final answer
    x = 2,717.23

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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.