Home / 13,221.72-19,837.68-6,981.48

Finding the Fourth Proportional to 13,221.72, 19,837.68 and 6,981.48

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Solution

The fourth proportional to 13,221.72, 19,837.68 and 6,981.48 is: 10,474.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.72 : 19,837.68 = 6,981.48 : x
  2. Step 2: Convert to fraction form
    13,221.72/19,837.68 = 6,981.48/x
  3. Step 3: Cross multiply
    13,221.72x = 19,837.68 × 6,981.48
  4. Step 4: Simplify right side
    13,221.72x = 138,496,366.17
  5. Step 5: Solve for x
    x = 138,496,366.17/13,221.72
  6. Step 6: Final answer
    x = 10,474.91

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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.