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Finding the Fourth Proportional to 8,409.88, 12,612.54 and 3,212.92

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Solution

The fourth proportional to 8,409.88, 12,612.54 and 3,212.92 is: 4,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,409.88 : 12,612.54 = 3,212.92 : x
  2. Step 2: Convert to fraction form
    8,409.88/12,612.54 = 3,212.92/x
  3. Step 3: Cross multiply
    8,409.88x = 12,612.54 × 3,212.92
  4. Step 4: Simplify right side
    8,409.88x = 40,523,082.02
  5. Step 5: Solve for x
    x = 40,523,082.02/8,409.88
  6. Step 6: Final answer
    x = 4,818.51

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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.