Home / 3,728.04-5,145.24-2,155.80

Finding the Fourth Proportional to 3,728.04, 5,145.24 and 2,155.80

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Solution

The fourth proportional to 3,728.04, 5,145.24 and 2,155.80 is: 2,975.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.04 : 5,145.24 = 2,155.80 : x
  2. Step 2: Convert to fraction form
    3,728.04/5,145.24 = 2,155.80/x
  3. Step 3: Cross multiply
    3,728.04x = 5,145.24 × 2,155.80
  4. Step 4: Simplify right side
    3,728.04x = 11,092,108.39
  5. Step 5: Solve for x
    x = 11,092,108.39/3,728.04
  6. Step 6: Final answer
    x = 2,975.32

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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.