Home / 3,807.28-5,253.78-2,128.76

Finding the Fourth Proportional to 3,807.28, 5,253.78 and 2,128.76

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Solution

The fourth proportional to 3,807.28, 5,253.78 and 2,128.76 is: 2,937.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.28 : 5,253.78 = 2,128.76 : x
  2. Step 2: Convert to fraction form
    3,807.28/5,253.78 = 2,128.76/x
  3. Step 3: Cross multiply
    3,807.28x = 5,253.78 × 2,128.76
  4. Step 4: Simplify right side
    3,807.28x = 11,184,036.71
  5. Step 5: Solve for x
    x = 11,184,036.71/3,807.28
  6. Step 6: Final answer
    x = 2,937.54

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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.