Home / 13,121.54-18,110.25-9,099.28

Finding the Fourth Proportional to 13,121.54, 18,110.25 and 9,099.28

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Solution

The fourth proportional to 13,121.54, 18,110.25 and 9,099.28 is: 12,558.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.54 : 18,110.25 = 9,099.28 : x
  2. Step 2: Convert to fraction form
    13,121.54/18,110.25 = 9,099.28/x
  3. Step 3: Cross multiply
    13,121.54x = 18,110.25 × 9,099.28
  4. Step 4: Simplify right side
    13,121.54x = 164,790,099.57
  5. Step 5: Solve for x
    x = 164,790,099.57/13,121.54
  6. Step 6: Final answer
    x = 12,558.75

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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.