Home / 5,154.72-7,730.78-1,991.52

Finding the Fourth Proportional to 5,154.72, 7,730.78 and 1,991.52

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Solution

The fourth proportional to 5,154.72, 7,730.78 and 1,991.52 is: 2,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,154.72 : 7,730.78 = 1,991.52 : x
  2. Step 2: Convert to fraction form
    5,154.72/7,730.78 = 1,991.52/x
  3. Step 3: Cross multiply
    5,154.72x = 7,730.78 × 1,991.52
  4. Step 4: Simplify right side
    5,154.72x = 15,395,993.03
  5. Step 5: Solve for x
    x = 15,395,993.03/5,154.72
  6. Step 6: Final answer
    x = 2,986.78

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1.5x scale

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.