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Finding the Fourth Proportional to 8,706.67, 11,987.89 and 7,683.56

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Solution

The fourth proportional to 8,706.67, 11,987.89 and 7,683.56 is: 10,579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.67 : 11,987.89 = 7,683.56 : x
  2. Step 2: Convert to fraction form
    8,706.67/11,987.89 = 7,683.56/x
  3. Step 3: Cross multiply
    8,706.67x = 11,987.89 × 7,683.56
  4. Step 4: Simplify right side
    8,706.67x = 92,109,705.33
  5. Step 5: Solve for x
    x = 92,109,705.33/8,706.67
  6. Step 6: Final answer
    x = 10,579.21

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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.