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Finding the Fourth Proportional to 6,628.60, 9,930.10 and 6,167.80

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Solution

The fourth proportional to 6,628.60, 9,930.10 and 6,167.80 is: 9,239.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.60 : 9,930.10 = 6,167.80 : x
  2. Step 2: Convert to fraction form
    6,628.60/9,930.10 = 6,167.80/x
  3. Step 3: Cross multiply
    6,628.60x = 9,930.10 × 6,167.80
  4. Step 4: Simplify right side
    6,628.60x = 61,246,870.78
  5. Step 5: Solve for x
    x = 61,246,870.78/6,628.60
  6. Step 6: Final answer
    x = 9,239.79

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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.