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Finding the Fourth Proportional to 6,601.67, 9,900.21 and 1,920.41

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Solution

The fourth proportional to 6,601.67, 9,900.21 and 1,920.41 is: 2,879.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,601.67 : 9,900.21 = 1,920.41 : x
  2. Step 2: Convert to fraction form
    6,601.67/9,900.21 = 1,920.41/x
  3. Step 3: Cross multiply
    6,601.67x = 9,900.21 × 1,920.41
  4. Step 4: Simplify right side
    6,601.67x = 19,012,462.29
  5. Step 5: Solve for x
    x = 19,012,462.29/6,601.67
  6. Step 6: Final answer
    x = 2,879.95

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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.