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Finding the Fourth Proportional to 8,706.60, 13,065.30 and 6,724.53

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Solution

The fourth proportional to 8,706.60, 13,065.30 and 6,724.53 is: 10,090.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.60 : 13,065.30 = 6,724.53 : x
  2. Step 2: Convert to fraction form
    8,706.60/13,065.30 = 6,724.53/x
  3. Step 3: Cross multiply
    8,706.60x = 13,065.30 × 6,724.53
  4. Step 4: Simplify right side
    8,706.60x = 87,858,001.81
  5. Step 5: Solve for x
    x = 87,858,001.81/8,706.60
  6. Step 6: Final answer
    x = 10,090.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.