Home / 5,157.12-7,111.92-3,478.80

Finding the Fourth Proportional to 5,157.12, 7,111.92 and 3,478.80

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Solution

The fourth proportional to 5,157.12, 7,111.92 and 3,478.80 is: 4,797.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.12 : 7,111.92 = 3,478.80 : x
  2. Step 2: Convert to fraction form
    5,157.12/7,111.92 = 3,478.80/x
  3. Step 3: Cross multiply
    5,157.12x = 7,111.92 × 3,478.80
  4. Step 4: Simplify right side
    5,157.12x = 24,740,947.30
  5. Step 5: Solve for x
    x = 24,740,947.30/5,157.12
  6. Step 6: Final answer
    x = 4,797.43

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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.