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Finding the Fourth Proportional to 20,168.60, 30,325.80 and 19,731.20

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Solution

The fourth proportional to 20,168.60, 30,325.80 and 19,731.20 is: 29,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.60 : 30,325.80 = 19,731.20 : x
  2. Step 2: Convert to fraction form
    20,168.60/30,325.80 = 19,731.20/x
  3. Step 3: Cross multiply
    20,168.60x = 30,325.80 × 19,731.20
  4. Step 4: Simplify right side
    20,168.60x = 598,364,424.96
  5. Step 5: Solve for x
    x = 598,364,424.96/20,168.60
  6. Step 6: Final answer
    x = 29,668.12

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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.