Home / 12,972.20-19,436.70-12,194.60

Finding the Fourth Proportional to 12,972.20, 19,436.70 and 12,194.60

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Solution

The fourth proportional to 12,972.20, 19,436.70 and 12,194.60 is: 18,271.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.20 : 19,436.70 = 12,194.60 : x
  2. Step 2: Convert to fraction form
    12,972.20/19,436.70 = 12,194.60/x
  3. Step 3: Cross multiply
    12,972.20x = 19,436.70 × 12,194.60
  4. Step 4: Simplify right side
    12,972.20x = 237,022,781.82
  5. Step 5: Solve for x
    x = 237,022,781.82/12,972.20
  6. Step 6: Final answer
    x = 18,271.59

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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.