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Finding the Fourth Proportional to 6,620.32, 9,932.64 and 3,157.12

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Solution

The fourth proportional to 6,620.32, 9,932.64 and 3,157.12 is: 4,736.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.32 : 9,932.64 = 3,157.12 : x
  2. Step 2: Convert to fraction form
    6,620.32/9,932.64 = 3,157.12/x
  3. Step 3: Cross multiply
    6,620.32x = 9,932.64 × 3,157.12
  4. Step 4: Simplify right side
    6,620.32x = 31,358,536.40
  5. Step 5: Solve for x
    x = 31,358,536.40/6,620.32
  6. Step 6: Final answer
    x = 4,736.71

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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.