Home / 3,940.34-5,437.40-2,171.70

Finding the Fourth Proportional to 3,940.34, 5,437.40 and 2,171.70

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Solution

The fourth proportional to 3,940.34, 5,437.40 and 2,171.70 is: 2,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.34 : 5,437.40 = 2,171.70 : x
  2. Step 2: Convert to fraction form
    3,940.34/5,437.40 = 2,171.70/x
  3. Step 3: Cross multiply
    3,940.34x = 5,437.40 × 2,171.70
  4. Step 4: Simplify right side
    3,940.34x = 11,808,390.72
  5. Step 5: Solve for x
    x = 11,808,390.72/3,940.34
  6. Step 6: Final answer
    x = 2,996.80

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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.