Home / 5,155.43-7,720.05-4,320.30

Finding the Fourth Proportional to 5,155.43, 7,720.05 and 4,320.30

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Solution

The fourth proportional to 5,155.43, 7,720.05 and 4,320.30 is: 6,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.43 : 7,720.05 = 4,320.30 : x
  2. Step 2: Convert to fraction form
    5,155.43/7,720.05 = 4,320.30/x
  3. Step 3: Cross multiply
    5,155.43x = 7,720.05 × 4,320.30
  4. Step 4: Simplify right side
    5,155.43x = 33,352,932.02
  5. Step 5: Solve for x
    x = 33,352,932.02/5,155.43
  6. Step 6: Final answer
    x = 6,469.48

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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.