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Finding the Fourth Proportional to 6,740.72, 9,311.28 and 6,111.96

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Solution

The fourth proportional to 6,740.72, 9,311.28 and 6,111.96 is: 8,442.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,740.72 : 9,311.28 = 6,111.96 : x
  2. Step 2: Convert to fraction form
    6,740.72/9,311.28 = 6,111.96/x
  3. Step 3: Cross multiply
    6,740.72x = 9,311.28 × 6,111.96
  4. Step 4: Simplify right side
    6,740.72x = 56,910,170.91
  5. Step 5: Solve for x
    x = 56,910,170.91/6,740.72
  6. Step 6: Final answer
    x = 8,442.74

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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.