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Finding the Fourth Proportional to 8,682.40, 13,004.40 and 6,719.20

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Solution

The fourth proportional to 8,682.40, 13,004.40 and 6,719.20 is: 10,063.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.40 : 13,004.40 = 6,719.20 : x
  2. Step 2: Convert to fraction form
    8,682.40/13,004.40 = 6,719.20/x
  3. Step 3: Cross multiply
    8,682.40x = 13,004.40 × 6,719.20
  4. Step 4: Simplify right side
    8,682.40x = 87,379,164.48
  5. Step 5: Solve for x
    x = 87,379,164.48/8,682.40
  6. Step 6: Final answer
    x = 10,063.94

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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.