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Finding the Fourth Proportional to 20,604.45, 30,733.46 and 18,712.46

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Solution

The fourth proportional to 20,604.45, 30,733.46 and 18,712.46 is: 27,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.45 : 30,733.46 = 18,712.46 : x
  2. Step 2: Convert to fraction form
    20,604.45/30,733.46 = 18,712.46/x
  3. Step 3: Cross multiply
    20,604.45x = 30,733.46 × 18,712.46
  4. Step 4: Simplify right side
    20,604.45x = 575,098,393.68
  5. Step 5: Solve for x
    x = 575,098,393.68/20,604.45
  6. Step 6: Final answer
    x = 27,911.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.