Home / 21,899.81-30,221.74-11,963.81

Finding the Fourth Proportional to 21,899.81, 30,221.74 and 11,963.81

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Solution

The fourth proportional to 21,899.81, 30,221.74 and 11,963.81 is: 16,510.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.81 : 30,221.74 = 11,963.81 : x
  2. Step 2: Convert to fraction form
    21,899.81/30,221.74 = 11,963.81/x
  3. Step 3: Cross multiply
    21,899.81x = 30,221.74 × 11,963.81
  4. Step 4: Simplify right side
    21,899.81x = 361,567,245.74
  5. Step 5: Solve for x
    x = 361,567,245.74/21,899.81
  6. Step 6: Final answer
    x = 16,510.06

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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.