Home / 3,929.92-5,424.24-2,880.16

Finding the Fourth Proportional to 3,929.92, 5,424.24 and 2,880.16

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Solution

The fourth proportional to 3,929.92, 5,424.24 and 2,880.16 is: 3,975.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.92 : 5,424.24 = 2,880.16 : x
  2. Step 2: Convert to fraction form
    3,929.92/5,424.24 = 2,880.16/x
  3. Step 3: Cross multiply
    3,929.92x = 5,424.24 × 2,880.16
  4. Step 4: Simplify right side
    3,929.92x = 15,622,679.08
  5. Step 5: Solve for x
    x = 15,622,679.08/3,929.92
  6. Step 6: Final answer
    x = 3,975.32

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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.