Home / 3,728.40-5,145.18-2,072.40

Finding the Fourth Proportional to 3,728.40, 5,145.18 and 2,072.40

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Solution

The fourth proportional to 3,728.40, 5,145.18 and 2,072.40 is: 2,859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.40 : 5,145.18 = 2,072.40 : x
  2. Step 2: Convert to fraction form
    3,728.40/5,145.18 = 2,072.40/x
  3. Step 3: Cross multiply
    3,728.40x = 5,145.18 × 2,072.40
  4. Step 4: Simplify right side
    3,728.40x = 10,662,871.03
  5. Step 5: Solve for x
    x = 10,662,871.03/3,728.40
  6. Step 6: Final answer
    x = 2,859.91

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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.