Home / 15,529.74-21,429.97-8,815.50

Finding the Fourth Proportional to 15,529.74, 21,429.97 and 8,815.50

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Solution

The fourth proportional to 15,529.74, 21,429.97 and 8,815.50 is: 12,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.74 : 21,429.97 = 8,815.50 : x
  2. Step 2: Convert to fraction form
    15,529.74/21,429.97 = 8,815.50/x
  3. Step 3: Cross multiply
    15,529.74x = 21,429.97 × 8,815.50
  4. Step 4: Simplify right side
    15,529.74x = 188,915,900.54
  5. Step 5: Solve for x
    x = 188,915,900.54/15,529.74
  6. Step 6: Final answer
    x = 12,164.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.