Home / 14,189.76-21,269.85-7,940.61

Finding the Fourth Proportional to 14,189.76, 21,269.85 and 7,940.61

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Solution

The fourth proportional to 14,189.76, 21,269.85 and 7,940.61 is: 11,902.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,189.76 : 21,269.85 = 7,940.61 : x
  2. Step 2: Convert to fraction form
    14,189.76/21,269.85 = 7,940.61/x
  3. Step 3: Cross multiply
    14,189.76x = 21,269.85 × 7,940.61
  4. Step 4: Simplify right side
    14,189.76x = 168,895,583.61
  5. Step 5: Solve for x
    x = 168,895,583.61/14,189.76
  6. Step 6: Final answer
    x = 11,902.64

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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.