Home / 21,789.08-32,696.38-8,639.82

Finding the Fourth Proportional to 21,789.08, 32,696.38 and 8,639.82

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Solution

The fourth proportional to 21,789.08, 32,696.38 and 8,639.82 is: 12,964.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.08 : 32,696.38 = 8,639.82 : x
  2. Step 2: Convert to fraction form
    21,789.08/32,696.38 = 8,639.82/x
  3. Step 3: Cross multiply
    21,789.08x = 32,696.38 × 8,639.82
  4. Step 4: Simplify right side
    21,789.08x = 282,490,837.85
  5. Step 5: Solve for x
    x = 282,490,837.85/21,789.08
  6. Step 6: Final answer
    x = 12,964.79

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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.