Home / 3,940.08-5,437.28-2,171.76

Finding the Fourth Proportional to 3,940.08, 5,437.28 and 2,171.76

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Solution

The fourth proportional to 3,940.08, 5,437.28 and 2,171.76 is: 2,997.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.08 : 5,437.28 = 2,171.76 : x
  2. Step 2: Convert to fraction form
    3,940.08/5,437.28 = 2,171.76/x
  3. Step 3: Cross multiply
    3,940.08x = 5,437.28 × 2,171.76
  4. Step 4: Simplify right side
    3,940.08x = 11,808,467.21
  5. Step 5: Solve for x
    x = 11,808,467.21/3,940.08
  6. Step 6: Final answer
    x = 2,997.01

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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.