Home / 12,380.20-18,570.30-10,997.80

Finding the Fourth Proportional to 12,380.20, 18,570.30 and 10,997.80

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Solution

The fourth proportional to 12,380.20, 18,570.30 and 10,997.80 is: 16,496.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.20 : 18,570.30 = 10,997.80 : x
  2. Step 2: Convert to fraction form
    12,380.20/18,570.30 = 10,997.80/x
  3. Step 3: Cross multiply
    12,380.20x = 18,570.30 × 10,997.80
  4. Step 4: Simplify right side
    12,380.20x = 204,232,445.34
  5. Step 5: Solve for x
    x = 204,232,445.34/12,380.20
  6. Step 6: Final answer
    x = 16,496.70

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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.