Home / 3,905.47-5,389.42-2,136.97

Finding the Fourth Proportional to 3,905.47, 5,389.42 and 2,136.97

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Solution

The fourth proportional to 3,905.47, 5,389.42 and 2,136.97 is: 2,948.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.47 : 5,389.42 = 2,136.97 : x
  2. Step 2: Convert to fraction form
    3,905.47/5,389.42 = 2,136.97/x
  3. Step 3: Cross multiply
    3,905.47x = 5,389.42 × 2,136.97
  4. Step 4: Simplify right side
    3,905.47x = 11,517,003.94
  5. Step 5: Solve for x
    x = 11,517,003.94/3,905.47
  6. Step 6: Final answer
    x = 2,948.94

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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.