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Finding the Fourth Proportional to 20,120.80, 30,181.20 and 16,840.30

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Solution

The fourth proportional to 20,120.80, 30,181.20 and 16,840.30 is: 25,260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.80 : 30,181.20 = 16,840.30 : x
  2. Step 2: Convert to fraction form
    20,120.80/30,181.20 = 16,840.30/x
  3. Step 3: Cross multiply
    20,120.80x = 30,181.20 × 16,840.30
  4. Step 4: Simplify right side
    20,120.80x = 508,260,462.36
  5. Step 5: Solve for x
    x = 508,260,462.36/20,120.80
  6. Step 6: Final answer
    x = 25,260.45

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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.