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Finding the Fourth Proportional to 18,492.80, 27,722.40 and 6,803.20

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Solution

The fourth proportional to 18,492.80, 27,722.40 and 6,803.20 is: 10,198.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,492.80 : 27,722.40 = 6,803.20 : x
  2. Step 2: Convert to fraction form
    18,492.80/27,722.40 = 6,803.20/x
  3. Step 3: Cross multiply
    18,492.80x = 27,722.40 × 6,803.20
  4. Step 4: Simplify right side
    18,492.80x = 188,601,031.68
  5. Step 5: Solve for x
    x = 188,601,031.68/18,492.80
  6. Step 6: Final answer
    x = 10,198.62

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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.