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Finding the Fourth Proportional to 6,686.65, 9,269.79 and 6,331.13

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Solution

The fourth proportional to 6,686.65, 9,269.79 and 6,331.13 is: 8,776.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,686.65 : 9,269.79 = 6,331.13 : x
  2. Step 2: Convert to fraction form
    6,686.65/9,269.79 = 6,331.13/x
  3. Step 3: Cross multiply
    6,686.65x = 9,269.79 × 6,331.13
  4. Step 4: Simplify right side
    6,686.65x = 58,688,245.56
  5. Step 5: Solve for x
    x = 58,688,245.56/6,686.65
  6. Step 6: Final answer
    x = 8,776.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.