Home / 3,938.20-5,434.76-2,170

Finding the Fourth Proportional to 3,938.20, 5,434.76 and 2,170

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Solution

The fourth proportional to 3,938.20, 5,434.76 and 2,170 is: 2,994.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.20 : 5,434.76 = 2,170 : x
  2. Step 2: Convert to fraction form
    3,938.20/5,434.76 = 2,170/x
  3. Step 3: Cross multiply
    3,938.20x = 5,434.76 × 2,170
  4. Step 4: Simplify right side
    3,938.20x = 11,793,429.20
  5. Step 5: Solve for x
    x = 11,793,429.20/3,938.20
  6. Step 6: Final answer
    x = 2,994.62

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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.