Home / 21,553.22-29,747.52-13,490.61

Finding the Fourth Proportional to 21,553.22, 29,747.52 and 13,490.61

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Solution

The fourth proportional to 21,553.22, 29,747.52 and 13,490.61 is: 18,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553.22 : 29,747.52 = 13,490.61 : x
  2. Step 2: Convert to fraction form
    21,553.22/29,747.52 = 13,490.61/x
  3. Step 3: Cross multiply
    21,553.22x = 29,747.52 × 13,490.61
  4. Step 4: Simplify right side
    21,553.22x = 401,312,190.79
  5. Step 5: Solve for x
    x = 401,312,190.79/21,553.22
  6. Step 6: Final answer
    x = 18,619.59

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1.5x scale

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.