Home / 3,911.59-5,398.01-2,143.36

Finding the Fourth Proportional to 3,911.59, 5,398.01 and 2,143.36

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Solution

The fourth proportional to 3,911.59, 5,398.01 and 2,143.36 is: 2,957.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.59 : 5,398.01 = 2,143.36 : x
  2. Step 2: Convert to fraction form
    3,911.59/5,398.01 = 2,143.36/x
  3. Step 3: Cross multiply
    3,911.59x = 5,398.01 × 2,143.36
  4. Step 4: Simplify right side
    3,911.59x = 11,569,878.71
  5. Step 5: Solve for x
    x = 11,569,878.71/3,911.59
  6. Step 6: Final answer
    x = 2,957.85

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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.