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Finding the Fourth Proportional to 7,540.64, 10,379.88 and 6,699.92

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Solution

The fourth proportional to 7,540.64, 10,379.88 and 6,699.92 is: 9,222.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,540.64 : 10,379.88 = 6,699.92 : x
  2. Step 2: Convert to fraction form
    7,540.64/10,379.88 = 6,699.92/x
  3. Step 3: Cross multiply
    7,540.64x = 10,379.88 × 6,699.92
  4. Step 4: Simplify right side
    7,540.64x = 69,544,365.61
  5. Step 5: Solve for x
    x = 69,544,365.61/7,540.64
  6. Step 6: Final answer
    x = 9,222.61

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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.