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Finding the Fourth Proportional to 11,103.60, 16,606.80 and 8,479.20

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Solution

The fourth proportional to 11,103.60, 16,606.80 and 8,479.20 is: 12,681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,103.60 : 16,606.80 = 8,479.20 : x
  2. Step 2: Convert to fraction form
    11,103.60/16,606.80 = 8,479.20/x
  3. Step 3: Cross multiply
    11,103.60x = 16,606.80 × 8,479.20
  4. Step 4: Simplify right side
    11,103.60x = 140,812,378.56
  5. Step 5: Solve for x
    x = 140,812,378.56/11,103.60
  6. Step 6: Final answer
    x = 12,681.69

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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.