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Finding the Fourth Proportional to 7,167.08, 9,890.57 and 3,980.88

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Solution

The fourth proportional to 7,167.08, 9,890.57 and 3,980.88 is: 5,493.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,167.08 : 9,890.57 = 3,980.88 : x
  2. Step 2: Convert to fraction form
    7,167.08/9,890.57 = 3,980.88/x
  3. Step 3: Cross multiply
    7,167.08x = 9,890.57 × 3,980.88
  4. Step 4: Simplify right side
    7,167.08x = 39,373,182.25
  5. Step 5: Solve for x
    x = 39,373,182.25/7,167.08
  6. Step 6: Final answer
    x = 5,493.61

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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.