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Finding the Fourth Proportional to 8,951.67, 12,356.63 and 7,687.65

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Solution

The fourth proportional to 8,951.67, 12,356.63 and 7,687.65 is: 10,611.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,951.67 : 12,356.63 = 7,687.65 : x
  2. Step 2: Convert to fraction form
    8,951.67/12,356.63 = 7,687.65/x
  3. Step 3: Cross multiply
    8,951.67x = 12,356.63 × 7,687.65
  4. Step 4: Simplify right side
    8,951.67x = 94,993,465.84
  5. Step 5: Solve for x
    x = 94,993,465.84/8,951.67
  6. Step 6: Final answer
    x = 10,611.81

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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.