Home / 21,822.88-30,115.78-12,391.64

Finding the Fourth Proportional to 21,822.88, 30,115.78 and 12,391.64

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Solution

The fourth proportional to 21,822.88, 30,115.78 and 12,391.64 is: 17,100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.88 : 30,115.78 = 12,391.64 : x
  2. Step 2: Convert to fraction form
    21,822.88/30,115.78 = 12,391.64/x
  3. Step 3: Cross multiply
    21,822.88x = 30,115.78 × 12,391.64
  4. Step 4: Simplify right side
    21,822.88x = 373,183,904.08
  5. Step 5: Solve for x
    x = 373,183,904.08/21,822.88
  6. Step 6: Final answer
    x = 17,100.58

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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.