Home / 3,905.70-5,389.65-2,136.96

Finding the Fourth Proportional to 3,905.70, 5,389.65 and 2,136.96

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Solution

The fourth proportional to 3,905.70, 5,389.65 and 2,136.96 is: 2,948.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.70 : 5,389.65 = 2,136.96 : x
  2. Step 2: Convert to fraction form
    3,905.70/5,389.65 = 2,136.96/x
  3. Step 3: Cross multiply
    3,905.70x = 5,389.65 × 2,136.96
  4. Step 4: Simplify right side
    3,905.70x = 11,517,466.46
  5. Step 5: Solve for x
    x = 11,517,466.46/3,905.70
  6. Step 6: Final answer
    x = 2,948.89

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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.