Home / 7,879.79-11,821.52-2,685.67

Finding the Fourth Proportional to 7,879.79, 11,821.52 and 2,685.67

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Solution

The fourth proportional to 7,879.79, 11,821.52 and 2,685.67 is: 4,029.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.79 : 11,821.52 = 2,685.67 : x
  2. Step 2: Convert to fraction form
    7,879.79/11,821.52 = 2,685.67/x
  3. Step 3: Cross multiply
    7,879.79x = 11,821.52 × 2,685.67
  4. Step 4: Simplify right side
    7,879.79x = 31,748,678.78
  5. Step 5: Solve for x
    x = 31,748,678.78/7,879.79
  6. Step 6: Final answer
    x = 4,029.13

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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.