Home / 7,188.20-10,782.30-5,438.60

Finding the Fourth Proportional to 7,188.20, 10,782.30 and 5,438.60

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Solution

The fourth proportional to 7,188.20, 10,782.30 and 5,438.60 is: 8,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.20 : 10,782.30 = 5,438.60 : x
  2. Step 2: Convert to fraction form
    7,188.20/10,782.30 = 5,438.60/x
  3. Step 3: Cross multiply
    7,188.20x = 10,782.30 × 5,438.60
  4. Step 4: Simplify right side
    7,188.20x = 58,640,616.78
  5. Step 5: Solve for x
    x = 58,640,616.78/7,188.20
  6. Step 6: Final answer
    x = 8,157.90

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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.