Home / 13,121.73-18,094.25-8,639.75

Finding the Fourth Proportional to 13,121.73, 18,094.25 and 8,639.75

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Solution

The fourth proportional to 13,121.73, 18,094.25 and 8,639.75 is: 11,913.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.73 : 18,094.25 = 8,639.75 : x
  2. Step 2: Convert to fraction form
    13,121.73/18,094.25 = 8,639.75/x
  3. Step 3: Cross multiply
    13,121.73x = 18,094.25 × 8,639.75
  4. Step 4: Simplify right side
    13,121.73x = 156,329,662.77
  5. Step 5: Solve for x
    x = 156,329,662.77/13,121.73
  6. Step 6: Final answer
    x = 11,913.80

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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.