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Finding the Fourth Proportional to 7,129.96, 9,842.09 and 6,382.60

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Solution

The fourth proportional to 7,129.96, 9,842.09 and 6,382.60 is: 8,810.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.96 : 9,842.09 = 6,382.60 : x
  2. Step 2: Convert to fraction form
    7,129.96/9,842.09 = 6,382.60/x
  3. Step 3: Cross multiply
    7,129.96x = 9,842.09 × 6,382.60
  4. Step 4: Simplify right side
    7,129.96x = 62,818,067.12
  5. Step 5: Solve for x
    x = 62,818,067.12/7,129.96
  6. Step 6: Final answer
    x = 8,810.44

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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.