Home / 5,382.79-7,427.91-3,145.30

Finding the Fourth Proportional to 5,382.79, 7,427.91 and 3,145.30

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Solution

The fourth proportional to 5,382.79, 7,427.91 and 3,145.30 is: 4,340.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.79 : 7,427.91 = 3,145.30 : x
  2. Step 2: Convert to fraction form
    5,382.79/7,427.91 = 3,145.30/x
  3. Step 3: Cross multiply
    5,382.79x = 7,427.91 × 3,145.30
  4. Step 4: Simplify right side
    5,382.79x = 23,363,005.32
  5. Step 5: Solve for x
    x = 23,363,005.32/5,382.79
  6. Step 6: Final answer
    x = 4,340.32

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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.