Home / 12,119.49-18,172.62-8,170.74

Finding the Fourth Proportional to 12,119.49, 18,172.62 and 8,170.74

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Solution

The fourth proportional to 12,119.49, 18,172.62 and 8,170.74 is: 12,251.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.49 : 18,172.62 = 8,170.74 : x
  2. Step 2: Convert to fraction form
    12,119.49/18,172.62 = 8,170.74/x
  3. Step 3: Cross multiply
    12,119.49x = 18,172.62 × 8,170.74
  4. Step 4: Simplify right side
    12,119.49x = 148,483,753.14
  5. Step 5: Solve for x
    x = 148,483,753.14/12,119.49
  6. Step 6: Final answer
    x = 12,251.65

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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.