Home / 7,905.40-11,857.19-3,220.66

Finding the Fourth Proportional to 7,905.40, 11,857.19 and 3,220.66

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Solution

The fourth proportional to 7,905.40, 11,857.19 and 3,220.66 is: 4,830.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.40 : 11,857.19 = 3,220.66 : x
  2. Step 2: Convert to fraction form
    7,905.40/11,857.19 = 3,220.66/x
  3. Step 3: Cross multiply
    7,905.40x = 11,857.19 × 3,220.66
  4. Step 4: Simplify right side
    7,905.40x = 38,187,976.26
  5. Step 5: Solve for x
    x = 38,187,976.26/7,905.40
  6. Step 6: Final answer
    x = 4,830.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.