Home / 15,504-21,395.52-8,789.76

Finding the Fourth Proportional to 15,504, 21,395.52 and 8,789.76

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Solution

The fourth proportional to 15,504, 21,395.52 and 8,789.76 is: 12,129.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504 : 21,395.52 = 8,789.76 : x
  2. Step 2: Convert to fraction form
    15,504/21,395.52 = 8,789.76/x
  3. Step 3: Cross multiply
    15,504x = 21,395.52 × 8,789.76
  4. Step 4: Simplify right side
    15,504x = 188,061,485.88
  5. Step 5: Solve for x
    x = 188,061,485.88/15,504
  6. Step 6: Final answer
    x = 12,129.87

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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.