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Finding the Fourth Proportional to 7,720.88, 10,650.06 and 6,728.54

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Solution

The fourth proportional to 7,720.88, 10,650.06 and 6,728.54 is: 9,281.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.88 : 10,650.06 = 6,728.54 : x
  2. Step 2: Convert to fraction form
    7,720.88/10,650.06 = 6,728.54/x
  3. Step 3: Cross multiply
    7,720.88x = 10,650.06 × 6,728.54
  4. Step 4: Simplify right side
    7,720.88x = 71,659,354.71
  5. Step 5: Solve for x
    x = 71,659,354.71/7,720.88
  6. Step 6: Final answer
    x = 9,281.24

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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.