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Finding the Fourth Proportional to 6,379.88, 9,570.09 and 3,913.16

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Solution

The fourth proportional to 6,379.88, 9,570.09 and 3,913.16 is: 5,869.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379.88 : 9,570.09 = 3,913.16 : x
  2. Step 2: Convert to fraction form
    6,379.88/9,570.09 = 3,913.16/x
  3. Step 3: Cross multiply
    6,379.88x = 9,570.09 × 3,913.16
  4. Step 4: Simplify right side
    6,379.88x = 37,449,293.38
  5. Step 5: Solve for x
    x = 37,449,293.38/6,379.88
  6. Step 6: Final answer
    x = 5,869.91

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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.