Home / 21,384.72-29,512.89-11,956.32

Finding the Fourth Proportional to 21,384.72, 29,512.89 and 11,956.32

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Solution

The fourth proportional to 21,384.72, 29,512.89 and 11,956.32 is: 16,500.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.72 : 29,512.89 = 11,956.32 : x
  2. Step 2: Convert to fraction form
    21,384.72/29,512.89 = 11,956.32/x
  3. Step 3: Cross multiply
    21,384.72x = 29,512.89 × 11,956.32
  4. Step 4: Simplify right side
    21,384.72x = 352,865,556.96
  5. Step 5: Solve for x
    x = 352,865,556.96/21,384.72
  6. Step 6: Final answer
    x = 16,500.83

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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.