Home / 3,916.91-5,405.16-2,148.47

Finding the Fourth Proportional to 3,916.91, 5,405.16 and 2,148.47

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Solution

The fourth proportional to 3,916.91, 5,405.16 and 2,148.47 is: 2,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.91 : 5,405.16 = 2,148.47 : x
  2. Step 2: Convert to fraction form
    3,916.91/5,405.16 = 2,148.47/x
  3. Step 3: Cross multiply
    3,916.91x = 5,405.16 × 2,148.47
  4. Step 4: Simplify right side
    3,916.91x = 11,612,837.68
  5. Step 5: Solve for x
    x = 11,612,837.68/3,916.91
  6. Step 6: Final answer
    x = 2,964.80

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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.