Home / 11,861.20-17,772.60-9,902.80

Finding the Fourth Proportional to 11,861.20, 17,772.60 and 9,902.80

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Solution

The fourth proportional to 11,861.20, 17,772.60 and 9,902.80 is: 14,838.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,861.20 : 17,772.60 = 9,902.80 : x
  2. Step 2: Convert to fraction form
    11,861.20/17,772.60 = 9,902.80/x
  3. Step 3: Cross multiply
    11,861.20x = 17,772.60 × 9,902.80
  4. Step 4: Simplify right side
    11,861.20x = 175,998,503.28
  5. Step 5: Solve for x
    x = 175,998,503.28/11,861.20
  6. Step 6: Final answer
    x = 14,838.17

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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.