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Finding the Fourth Proportional to 11,187.60, 16,817.85 and 7,923.30

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Solution

The fourth proportional to 11,187.60, 16,817.85 and 7,923.30 is: 11,910.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.60 : 16,817.85 = 7,923.30 : x
  2. Step 2: Convert to fraction form
    11,187.60/16,817.85 = 7,923.30/x
  3. Step 3: Cross multiply
    11,187.60x = 16,817.85 × 7,923.30
  4. Step 4: Simplify right side
    11,187.60x = 133,252,870.91
  5. Step 5: Solve for x
    x = 133,252,870.91/11,187.60
  6. Step 6: Final answer
    x = 11,910.76

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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.