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Finding the Fourth Proportional to 20,343.78, 30,516.18 and 6,492.78

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Solution

The fourth proportional to 20,343.78, 30,516.18 and 6,492.78 is: 9,739.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.78 : 30,516.18 = 6,492.78 : x
  2. Step 2: Convert to fraction form
    20,343.78/30,516.18 = 6,492.78/x
  3. Step 3: Cross multiply
    20,343.78x = 30,516.18 × 6,492.78
  4. Step 4: Simplify right side
    20,343.78x = 198,134,843.18
  5. Step 5: Solve for x
    x = 198,134,843.18/20,343.78
  6. Step 6: Final answer
    x = 9,739.33

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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.