Home / 12,072.87-18,109.29-3,307.86

Finding the Fourth Proportional to 12,072.87, 18,109.29 and 3,307.86

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Solution

The fourth proportional to 12,072.87, 18,109.29 and 3,307.86 is: 4,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,072.87 : 18,109.29 = 3,307.86 : x
  2. Step 2: Convert to fraction form
    12,072.87/18,109.29 = 3,307.86/x
  3. Step 3: Cross multiply
    12,072.87x = 18,109.29 × 3,307.86
  4. Step 4: Simplify right side
    12,072.87x = 59,902,996.02
  5. Step 5: Solve for x
    x = 59,902,996.02/12,072.87
  6. Step 6: Final answer
    x = 4,961.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.