Home / 13,638.51-20,435.90-12,326.31

Finding the Fourth Proportional to 13,638.51, 20,435.90 and 12,326.31

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Solution

The fourth proportional to 13,638.51, 20,435.90 and 12,326.31 is: 18,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.51 : 20,435.90 = 12,326.31 : x
  2. Step 2: Convert to fraction form
    13,638.51/20,435.90 = 12,326.31/x
  3. Step 3: Cross multiply
    13,638.51x = 20,435.90 × 12,326.31
  4. Step 4: Simplify right side
    13,638.51x = 251,899,176.90
  5. Step 5: Solve for x
    x = 251,899,176.90/13,638.51
  6. Step 6: Final answer
    x = 18,469.70

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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.