Home / 3,807.28-5,253.88-2,128.88

Finding the Fourth Proportional to 3,807.28, 5,253.88 and 2,128.88

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Solution

The fourth proportional to 3,807.28, 5,253.88 and 2,128.88 is: 2,937.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.28 : 5,253.88 = 2,128.88 : x
  2. Step 2: Convert to fraction form
    3,807.28/5,253.88 = 2,128.88/x
  3. Step 3: Cross multiply
    3,807.28x = 5,253.88 × 2,128.88
  4. Step 4: Simplify right side
    3,807.28x = 11,184,880.05
  5. Step 5: Solve for x
    x = 11,184,880.05/3,807.28
  6. Step 6: Final answer
    x = 2,937.76

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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.