Home / 5,421.79-8,119.68-2,782.34

Finding the Fourth Proportional to 5,421.79, 8,119.68 and 2,782.34

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Solution

The fourth proportional to 5,421.79, 8,119.68 and 2,782.34 is: 4,166.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.79 : 8,119.68 = 2,782.34 : x
  2. Step 2: Convert to fraction form
    5,421.79/8,119.68 = 2,782.34/x
  3. Step 3: Cross multiply
    5,421.79x = 8,119.68 × 2,782.34
  4. Step 4: Simplify right side
    5,421.79x = 22,591,710.45
  5. Step 5: Solve for x
    x = 22,591,710.45/5,421.79
  6. Step 6: Final answer
    x = 4,166.84

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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.