Home / 3,431.16-5,121.63-2,947.32

Finding the Fourth Proportional to 3,431.16, 5,121.63 and 2,947.32

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Solution

The fourth proportional to 3,431.16, 5,121.63 and 2,947.32 is: 4,399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.16 : 5,121.63 = 2,947.32 : x
  2. Step 2: Convert to fraction form
    3,431.16/5,121.63 = 2,947.32/x
  3. Step 3: Cross multiply
    3,431.16x = 5,121.63 × 2,947.32
  4. Step 4: Simplify right side
    3,431.16x = 15,095,082.53
  5. Step 5: Solve for x
    x = 15,095,082.53/3,431.16
  6. Step 6: Final answer
    x = 4,399.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.