Home / 3,916.40-5,405.76-2,238.73

Finding the Fourth Proportional to 3,916.40, 5,405.76 and 2,238.73

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Solution

The fourth proportional to 3,916.40, 5,405.76 and 2,238.73 is: 3,090.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.40 : 5,405.76 = 2,238.73 : x
  2. Step 2: Convert to fraction form
    3,916.40/5,405.76 = 2,238.73/x
  3. Step 3: Cross multiply
    3,916.40x = 5,405.76 × 2,238.73
  4. Step 4: Simplify right side
    3,916.40x = 12,102,023.57
  5. Step 5: Solve for x
    x = 12,102,023.57/3,916.40
  6. Step 6: Final answer
    x = 3,090.09

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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.