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Finding the Fourth Proportional to 6,620.55, 9,921.59 and 4,975.17

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Solution

The fourth proportional to 6,620.55, 9,921.59 and 4,975.17 is: 7,455.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.55 : 9,921.59 = 4,975.17 : x
  2. Step 2: Convert to fraction form
    6,620.55/9,921.59 = 4,975.17/x
  3. Step 3: Cross multiply
    6,620.55x = 9,921.59 × 4,975.17
  4. Step 4: Simplify right side
    6,620.55x = 49,361,604.69
  5. Step 5: Solve for x
    x = 49,361,604.69/6,620.55
  6. Step 6: Final answer
    x = 7,455.82

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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.