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Finding the Fourth Proportional to 6,607.78, 9,911.67 and 3,320.09

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Solution

The fourth proportional to 6,607.78, 9,911.67 and 3,320.09 is: 4,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,607.78 : 9,911.67 = 3,320.09 : x
  2. Step 2: Convert to fraction form
    6,607.78/9,911.67 = 3,320.09/x
  3. Step 3: Cross multiply
    6,607.78x = 9,911.67 × 3,320.09
  4. Step 4: Simplify right side
    6,607.78x = 32,907,611.61
  5. Step 5: Solve for x
    x = 32,907,611.61/6,607.78
  6. Step 6: Final answer
    x = 4,980.13

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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.