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Finding the Fourth Proportional to 9,199.68, 12,691.80 and 6,406.80

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Solution

The fourth proportional to 9,199.68, 12,691.80 and 6,406.80 is: 8,838.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,199.68 : 12,691.80 = 6,406.80 : x
  2. Step 2: Convert to fraction form
    9,199.68/12,691.80 = 6,406.80/x
  3. Step 3: Cross multiply
    9,199.68x = 12,691.80 × 6,406.80
  4. Step 4: Simplify right side
    9,199.68x = 81,313,824.24
  5. Step 5: Solve for x
    x = 81,313,824.24/9,199.68
  6. Step 6: Final answer
    x = 8,838.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.