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Finding the Fourth Proportional to 6,491.58, 9,729.62 and 3,720.15

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Solution

The fourth proportional to 6,491.58, 9,729.62 and 3,720.15 is: 5,575.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,491.58 : 9,729.62 = 3,720.15 : x
  2. Step 2: Convert to fraction form
    6,491.58/9,729.62 = 3,720.15/x
  3. Step 3: Cross multiply
    6,491.58x = 9,729.62 × 3,720.15
  4. Step 4: Simplify right side
    6,491.58x = 36,195,627.24
  5. Step 5: Solve for x
    x = 36,195,627.24/6,491.58
  6. Step 6: Final answer
    x = 5,575.78

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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.