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Finding the Fourth Proportional to 18,461.80, 27,692.70 and 16,820.20

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Solution

The fourth proportional to 18,461.80, 27,692.70 and 16,820.20 is: 25,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.80 : 27,692.70 = 16,820.20 : x
  2. Step 2: Convert to fraction form
    18,461.80/27,692.70 = 16,820.20/x
  3. Step 3: Cross multiply
    18,461.80x = 27,692.70 × 16,820.20
  4. Step 4: Simplify right side
    18,461.80x = 465,796,752.54
  5. Step 5: Solve for x
    x = 465,796,752.54/18,461.80
  6. Step 6: Final answer
    x = 25,230.30

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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.