Home / 3,880.16-5,356.68-3,115.62

Finding the Fourth Proportional to 3,880.16, 5,356.68 and 3,115.62

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Solution

The fourth proportional to 3,880.16, 5,356.68 and 3,115.62 is: 4,301.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.16 : 5,356.68 = 3,115.62 : x
  2. Step 2: Convert to fraction form
    3,880.16/5,356.68 = 3,115.62/x
  3. Step 3: Cross multiply
    3,880.16x = 5,356.68 × 3,115.62
  4. Step 4: Simplify right side
    3,880.16x = 16,689,379.34
  5. Step 5: Solve for x
    x = 16,689,379.34/3,880.16
  6. Step 6: Final answer
    x = 4,301.21

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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.