Home / 13,720.26-18,916.74-11,199.81

Finding the Fourth Proportional to 13,720.26, 18,916.74 and 11,199.81

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Solution

The fourth proportional to 13,720.26, 18,916.74 and 11,199.81 is: 15,441.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.26 : 18,916.74 = 11,199.81 : x
  2. Step 2: Convert to fraction form
    13,720.26/18,916.74 = 11,199.81/x
  3. Step 3: Cross multiply
    13,720.26x = 18,916.74 × 11,199.81
  4. Step 4: Simplify right side
    13,720.26x = 211,863,893.82
  5. Step 5: Solve for x
    x = 211,863,893.82/13,720.26
  6. Step 6: Final answer
    x = 15,441.68

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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.