Home / 3,905.42-5,389.47-2,137.02

Finding the Fourth Proportional to 3,905.42, 5,389.47 and 2,137.02

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Solution

The fourth proportional to 3,905.42, 5,389.47 and 2,137.02 is: 2,949.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.42 : 5,389.47 = 2,137.02 : x
  2. Step 2: Convert to fraction form
    3,905.42/5,389.47 = 2,137.02/x
  3. Step 3: Cross multiply
    3,905.42x = 5,389.47 × 2,137.02
  4. Step 4: Simplify right side
    3,905.42x = 11,517,405.18
  5. Step 5: Solve for x
    x = 11,517,405.18/3,905.42
  6. Step 6: Final answer
    x = 2,949.09

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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.