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Finding the Fourth Proportional to 13,798.20, 20,697.30 and 13,193.40

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Solution

The fourth proportional to 13,798.20, 20,697.30 and 13,193.40 is: 19,790.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,798.20 : 20,697.30 = 13,193.40 : x
  2. Step 2: Convert to fraction form
    13,798.20/20,697.30 = 13,193.40/x
  3. Step 3: Cross multiply
    13,798.20x = 20,697.30 × 13,193.40
  4. Step 4: Simplify right side
    13,798.20x = 273,067,757.82
  5. Step 5: Solve for x
    x = 273,067,757.82/13,798.20
  6. Step 6: Final answer
    x = 19,790.10

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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.