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Finding the Fourth Proportional to 20,006.80, 29,977.80 and 18,840.40

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Solution

The fourth proportional to 20,006.80, 29,977.80 and 18,840.40 is: 28,230.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,006.80 : 29,977.80 = 18,840.40 : x
  2. Step 2: Convert to fraction form
    20,006.80/29,977.80 = 18,840.40/x
  3. Step 3: Cross multiply
    20,006.80x = 29,977.80 × 18,840.40
  4. Step 4: Simplify right side
    20,006.80x = 564,793,743.12
  5. Step 5: Solve for x
    x = 564,793,743.12/20,006.80
  6. Step 6: Final answer
    x = 28,230.09

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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.