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Finding the Fourth Proportional to 11,212.60, 16,818.90 and 8,303.80

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Solution

The fourth proportional to 11,212.60, 16,818.90 and 8,303.80 is: 12,455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.60 : 16,818.90 = 8,303.80 : x
  2. Step 2: Convert to fraction form
    11,212.60/16,818.90 = 8,303.80/x
  3. Step 3: Cross multiply
    11,212.60x = 16,818.90 × 8,303.80
  4. Step 4: Simplify right side
    11,212.60x = 139,660,781.82
  5. Step 5: Solve for x
    x = 139,660,781.82/11,212.60
  6. Step 6: Final answer
    x = 12,455.70

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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.