Home / 3,905.10-5,389.08-2,136.74

Finding the Fourth Proportional to 3,905.10, 5,389.08 and 2,136.74

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Solution

The fourth proportional to 3,905.10, 5,389.08 and 2,136.74 is: 2,948.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.10 : 5,389.08 = 2,136.74 : x
  2. Step 2: Convert to fraction form
    3,905.10/5,389.08 = 2,136.74/x
  3. Step 3: Cross multiply
    3,905.10x = 5,389.08 × 2,136.74
  4. Step 4: Simplify right side
    3,905.10x = 11,515,035.85
  5. Step 5: Solve for x
    x = 11,515,035.85/3,905.10
  6. Step 6: Final answer
    x = 2,948.72

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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.