Home / 3,916.90-5,405.37-2,148.47

Finding the Fourth Proportional to 3,916.90, 5,405.37 and 2,148.47

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Solution

The fourth proportional to 3,916.90, 5,405.37 and 2,148.47 is: 2,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.90 : 5,405.37 = 2,148.47 : x
  2. Step 2: Convert to fraction form
    3,916.90/5,405.37 = 2,148.47/x
  3. Step 3: Cross multiply
    3,916.90x = 5,405.37 × 2,148.47
  4. Step 4: Simplify right side
    3,916.90x = 11,613,260.47
  5. Step 5: Solve for x
    x = 11,613,260.47/3,916.90
  6. Step 6: Final answer
    x = 2,964.91

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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.