Home / 7,890.66-11,839.50-4,191.99

Finding the Fourth Proportional to 7,890.66, 11,839.50 and 4,191.99

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Solution

The fourth proportional to 7,890.66, 11,839.50 and 4,191.99 is: 6,289.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.66 : 11,839.50 = 4,191.99 : x
  2. Step 2: Convert to fraction form
    7,890.66/11,839.50 = 4,191.99/x
  3. Step 3: Cross multiply
    7,890.66x = 11,839.50 × 4,191.99
  4. Step 4: Simplify right side
    7,890.66x = 49,631,065.61
  5. Step 5: Solve for x
    x = 49,631,065.61/7,890.66
  6. Step 6: Final answer
    x = 6,289.85

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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.