Home / 3,916.79-5,405.52-2,148.74

Finding the Fourth Proportional to 3,916.79, 5,405.52 and 2,148.74

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Solution

The fourth proportional to 3,916.79, 5,405.52 and 2,148.74 is: 2,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.79 : 5,405.52 = 2,148.74 : x
  2. Step 2: Convert to fraction form
    3,916.79/5,405.52 = 2,148.74/x
  3. Step 3: Cross multiply
    3,916.79x = 5,405.52 × 2,148.74
  4. Step 4: Simplify right side
    3,916.79x = 11,615,049.33
  5. Step 5: Solve for x
    x = 11,615,049.33/3,916.79
  6. Step 6: Final answer
    x = 2,965.45

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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.