Home / 21,212.24-31,786.34-19,344.78

Finding the Fourth Proportional to 21,212.24, 31,786.34 and 19,344.78

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Solution

The fourth proportional to 21,212.24, 31,786.34 and 19,344.78 is: 28,987.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.24 : 31,786.34 = 19,344.78 : x
  2. Step 2: Convert to fraction form
    21,212.24/31,786.34 = 19,344.78/x
  3. Step 3: Cross multiply
    21,212.24x = 31,786.34 × 19,344.78
  4. Step 4: Simplify right side
    21,212.24x = 614,899,754.31
  5. Step 5: Solve for x
    x = 614,899,754.31/21,212.24
  6. Step 6: Final answer
    x = 28,987.97

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1.5x scale

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.