Home / 3,916.86-5,405.23-2,148.46

Finding the Fourth Proportional to 3,916.86, 5,405.23 and 2,148.46

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Solution

The fourth proportional to 3,916.86, 5,405.23 and 2,148.46 is: 2,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.86 : 5,405.23 = 2,148.46 : x
  2. Step 2: Convert to fraction form
    3,916.86/5,405.23 = 2,148.46/x
  3. Step 3: Cross multiply
    3,916.86x = 5,405.23 × 2,148.46
  4. Step 4: Simplify right side
    3,916.86x = 11,612,909.62
  5. Step 5: Solve for x
    x = 11,612,909.62/3,916.86
  6. Step 6: Final answer
    x = 2,964.85

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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.