Home / 13,815.72-20,711.70-5,501.61

Finding the Fourth Proportional to 13,815.72, 20,711.70 and 5,501.61

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Solution

The fourth proportional to 13,815.72, 20,711.70 and 5,501.61 is: 8,247.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.72 : 20,711.70 = 5,501.61 : x
  2. Step 2: Convert to fraction form
    13,815.72/20,711.70 = 5,501.61/x
  3. Step 3: Cross multiply
    13,815.72x = 20,711.70 × 5,501.61
  4. Step 4: Simplify right side
    13,815.72x = 113,947,695.84
  5. Step 5: Solve for x
    x = 113,947,695.84/13,815.72
  6. Step 6: Final answer
    x = 8,247.68

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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.