Home / 3,916.95-5,405.39-2,148.56

Finding the Fourth Proportional to 3,916.95, 5,405.39 and 2,148.56

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Solution

The fourth proportional to 3,916.95, 5,405.39 and 2,148.56 is: 2,965.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.95 : 5,405.39 = 2,148.56 : x
  2. Step 2: Convert to fraction form
    3,916.95/5,405.39 = 2,148.56/x
  3. Step 3: Cross multiply
    3,916.95x = 5,405.39 × 2,148.56
  4. Step 4: Simplify right side
    3,916.95x = 11,613,792.20
  5. Step 5: Solve for x
    x = 11,613,792.20/3,916.95
  6. Step 6: Final answer
    x = 2,965.01

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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.