Home / 13,121.22-18,093.56-8,639.25

Finding the Fourth Proportional to 13,121.22, 18,093.56 and 8,639.25

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Solution

The fourth proportional to 13,121.22, 18,093.56 and 8,639.25 is: 11,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.22 : 18,093.56 = 8,639.25 : x
  2. Step 2: Convert to fraction form
    13,121.22/18,093.56 = 8,639.25/x
  3. Step 3: Cross multiply
    13,121.22x = 18,093.56 × 8,639.25
  4. Step 4: Simplify right side
    13,121.22x = 156,314,788.23
  5. Step 5: Solve for x
    x = 156,314,788.23/13,121.22
  6. Step 6: Final answer
    x = 11,913.13

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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.