Home / 11,110.20-16,665.30-7,999.80

Finding the Fourth Proportional to 11,110.20, 16,665.30 and 7,999.80

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Solution

The fourth proportional to 11,110.20, 16,665.30 and 7,999.80 is: 11,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,110.20 : 16,665.30 = 7,999.80 : x
  2. Step 2: Convert to fraction form
    11,110.20/16,665.30 = 7,999.80/x
  3. Step 3: Cross multiply
    11,110.20x = 16,665.30 × 7,999.80
  4. Step 4: Simplify right side
    11,110.20x = 133,319,066.94
  5. Step 5: Solve for x
    x = 133,319,066.94/11,110.20
  6. Step 6: Final answer
    x = 11,999.70

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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.