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Finding the Fourth Proportional to 6,665.00, 9,990.20 and 4,200.98

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Solution

The fourth proportional to 6,665.00, 9,990.20 and 4,200.98 is: 6,296.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.00 : 9,990.20 = 4,200.98 : x
  2. Step 2: Convert to fraction form
    6,665.00/9,990.20 = 4,200.98/x
  3. Step 3: Cross multiply
    6,665.00x = 9,990.20 × 4,200.98
  4. Step 4: Simplify right side
    6,665.00x = 41,968,590.95
  5. Step 5: Solve for x
    x = 41,968,590.95/6,665.00
  6. Step 6: Final answer
    x = 6,296.87

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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.