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Finding the Fourth Proportional to 20,541.40, 30,812.10 and 19,418.20

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Solution

The fourth proportional to 20,541.40, 30,812.10 and 19,418.20 is: 29,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,541.40 : 30,812.10 = 19,418.20 : x
  2. Step 2: Convert to fraction form
    20,541.40/30,812.10 = 19,418.20/x
  3. Step 3: Cross multiply
    20,541.40x = 30,812.10 × 19,418.20
  4. Step 4: Simplify right side
    20,541.40x = 598,315,520.22
  5. Step 5: Solve for x
    x = 598,315,520.22/20,541.40
  6. Step 6: Final answer
    x = 29,127.30

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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.