Home / 7,815.79-11,721.86-3,658.67

Finding the Fourth Proportional to 7,815.79, 11,721.86 and 3,658.67

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Solution

The fourth proportional to 7,815.79, 11,721.86 and 3,658.67 is: 5,487.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.79 : 11,721.86 = 3,658.67 : x
  2. Step 2: Convert to fraction form
    7,815.79/11,721.86 = 3,658.67/x
  3. Step 3: Cross multiply
    7,815.79x = 11,721.86 × 3,658.67
  4. Step 4: Simplify right side
    7,815.79x = 42,886,418.88
  5. Step 5: Solve for x
    x = 42,886,418.88/7,815.79
  6. Step 6: Final answer
    x = 5,487.15

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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.