Home / 13,719.26-18,915.36-11,198.81

Finding the Fourth Proportional to 13,719.26, 18,915.36 and 11,198.81

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Solution

The fourth proportional to 13,719.26, 18,915.36 and 11,198.81 is: 15,440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.26 : 18,915.36 = 11,198.81 : x
  2. Step 2: Convert to fraction form
    13,719.26/18,915.36 = 11,198.81/x
  3. Step 3: Cross multiply
    13,719.26x = 18,915.36 × 11,198.81
  4. Step 4: Simplify right side
    13,719.26x = 211,829,428.14
  5. Step 5: Solve for x
    x = 211,829,428.14/13,719.26
  6. Step 6: Final answer
    x = 15,440.30

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1.5x scale

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.