Home / 3,937.20-5,433.93-2,991.45

Finding the Fourth Proportional to 3,937.20, 5,433.93 and 2,991.45

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Solution

The fourth proportional to 3,937.20, 5,433.93 and 2,991.45 is: 4,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.20 : 5,433.93 = 2,991.45 : x
  2. Step 2: Convert to fraction form
    3,937.20/5,433.93 = 2,991.45/x
  3. Step 3: Cross multiply
    3,937.20x = 5,433.93 × 2,991.45
  4. Step 4: Simplify right side
    3,937.20x = 16,255,329.90
  5. Step 5: Solve for x
    x = 16,255,329.90/3,937.20
  6. Step 6: Final answer
    x = 4,128.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.