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Finding the Fourth Proportional to 8,999.80, 13,499.70 and 8,222.20

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Solution

The fourth proportional to 8,999.80, 13,499.70 and 8,222.20 is: 12,333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.80 : 13,499.70 = 8,222.20 : x
  2. Step 2: Convert to fraction form
    8,999.80/13,499.70 = 8,222.20/x
  3. Step 3: Cross multiply
    8,999.80x = 13,499.70 × 8,222.20
  4. Step 4: Simplify right side
    8,999.80x = 110,997,233.34
  5. Step 5: Solve for x
    x = 110,997,233.34/8,999.80
  6. Step 6: Final answer
    x = 12,333.30

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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.