Home / 21,211.37-31,823.97-10,116.61

Finding the Fourth Proportional to 21,211.37, 31,823.97 and 10,116.61

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Solution

The fourth proportional to 21,211.37, 31,823.97 and 10,116.61 is: 15,178.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.37 : 31,823.97 = 10,116.61 : x
  2. Step 2: Convert to fraction form
    21,211.37/31,823.97 = 10,116.61/x
  3. Step 3: Cross multiply
    21,211.37x = 31,823.97 × 10,116.61
  4. Step 4: Simplify right side
    21,211.37x = 321,950,642.56
  5. Step 5: Solve for x
    x = 321,950,642.56/21,211.37
  6. Step 6: Final answer
    x = 15,178.21

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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.