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Finding the Fourth Proportional to 8,672.85, 12,989.82 and 6,719.13

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Solution

The fourth proportional to 8,672.85, 12,989.82 and 6,719.13 is: 10,063.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.85 : 12,989.82 = 6,719.13 : x
  2. Step 2: Convert to fraction form
    8,672.85/12,989.82 = 6,719.13/x
  3. Step 3: Cross multiply
    8,672.85x = 12,989.82 × 6,719.13
  4. Step 4: Simplify right side
    8,672.85x = 87,280,289.26
  5. Step 5: Solve for x
    x = 87,280,289.26/8,672.85
  6. Step 6: Final answer
    x = 10,063.62

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1.5x scale

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.