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Finding the Fourth Proportional to 18,420.80, 27,630.84 and 5,941.76

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Solution

The fourth proportional to 18,420.80, 27,630.84 and 5,941.76 is: 8,912.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.80 : 27,630.84 = 5,941.76 : x
  2. Step 2: Convert to fraction form
    18,420.80/27,630.84 = 5,941.76/x
  3. Step 3: Cross multiply
    18,420.80x = 27,630.84 × 5,941.76
  4. Step 4: Simplify right side
    18,420.80x = 164,175,819.88
  5. Step 5: Solve for x
    x = 164,175,819.88/18,420.80
  6. Step 6: Final answer
    x = 8,912.52

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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.