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Finding the Fourth Proportional to 20,540.20, 30,810.20 and 8,051.40

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Solution

The fourth proportional to 20,540.20, 30,810.20 and 8,051.40 is: 12,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.20 : 30,810.20 = 8,051.40 : x
  2. Step 2: Convert to fraction form
    20,540.20/30,810.20 = 8,051.40/x
  3. Step 3: Cross multiply
    20,540.20x = 30,810.20 × 8,051.40
  4. Step 4: Simplify right side
    20,540.20x = 248,065,244.28
  5. Step 5: Solve for x
    x = 248,065,244.28/20,540.20
  6. Step 6: Final answer
    x = 12,077.06

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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.