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Finding the Fourth Proportional to 11,818.40, 17,727.60 and 9,917.60

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Solution

The fourth proportional to 11,818.40, 17,727.60 and 9,917.60 is: 14,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.40 : 17,727.60 = 9,917.60 : x
  2. Step 2: Convert to fraction form
    11,818.40/17,727.60 = 9,917.60/x
  3. Step 3: Cross multiply
    11,818.40x = 17,727.60 × 9,917.60
  4. Step 4: Simplify right side
    11,818.40x = 175,815,245.76
  5. Step 5: Solve for x
    x = 175,815,245.76/11,818.40
  6. Step 6: Final answer
    x = 14,876.40

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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.