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Finding the Fourth Proportional to 13,795.72, 20,696.31 and 5,479.65

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Solution

The fourth proportional to 13,795.72, 20,696.31 and 5,479.65 is: 8,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,795.72 : 20,696.31 = 5,479.65 : x
  2. Step 2: Convert to fraction form
    13,795.72/20,696.31 = 5,479.65/x
  3. Step 3: Cross multiply
    13,795.72x = 20,696.31 × 5,479.65
  4. Step 4: Simplify right side
    13,795.72x = 113,408,535.09
  5. Step 5: Solve for x
    x = 113,408,535.09/13,795.72
  6. Step 6: Final answer
    x = 8,220.56

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1.5x scale

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.