Home / 5,438.10-8,157.15-3,105.30

Finding the Fourth Proportional to 5,438.10, 8,157.15 and 3,105.30

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Solution

The fourth proportional to 5,438.10, 8,157.15 and 3,105.30 is: 4,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438.10 : 8,157.15 = 3,105.30 : x
  2. Step 2: Convert to fraction form
    5,438.10/8,157.15 = 3,105.30/x
  3. Step 3: Cross multiply
    5,438.10x = 8,157.15 × 3,105.30
  4. Step 4: Simplify right side
    5,438.10x = 25,330,397.90
  5. Step 5: Solve for x
    x = 25,330,397.90/5,438.10
  6. Step 6: Final answer
    x = 4,657.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.