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Finding the Fourth Proportional to 8,645.70, 12,972.79 and 3,099.48

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Solution

The fourth proportional to 8,645.70, 12,972.79 and 3,099.48 is: 4,650.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.70 : 12,972.79 = 3,099.48 : x
  2. Step 2: Convert to fraction form
    8,645.70/12,972.79 = 3,099.48/x
  3. Step 3: Cross multiply
    8,645.70x = 12,972.79 × 3,099.48
  4. Step 4: Simplify right side
    8,645.70x = 40,208,903.15
  5. Step 5: Solve for x
    x = 40,208,903.15/8,645.70
  6. Step 6: Final answer
    x = 4,650.74

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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.