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Finding the Fourth Proportional to 6,620.59, 9,120.99 and 4,627.99

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Solution

The fourth proportional to 6,620.59, 9,120.99 and 4,627.99 is: 6,375.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.59 : 9,120.99 = 4,627.99 : x
  2. Step 2: Convert to fraction form
    6,620.59/9,120.99 = 4,627.99/x
  3. Step 3: Cross multiply
    6,620.59x = 9,120.99 × 4,627.99
  4. Step 4: Simplify right side
    6,620.59x = 42,211,850.51
  5. Step 5: Solve for x
    x = 42,211,850.51/6,620.59
  6. Step 6: Final answer
    x = 6,375.84

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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.