Home / 13,620.42-20,471.40-11,295.72

Finding the Fourth Proportional to 13,620.42, 20,471.40 and 11,295.72

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Solution

The fourth proportional to 13,620.42, 20,471.40 and 11,295.72 is: 16,977.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.42 : 20,471.40 = 11,295.72 : x
  2. Step 2: Convert to fraction form
    13,620.42/20,471.40 = 11,295.72/x
  3. Step 3: Cross multiply
    13,620.42x = 20,471.40 × 11,295.72
  4. Step 4: Simplify right side
    13,620.42x = 231,239,202.41
  5. Step 5: Solve for x
    x = 231,239,202.41/13,620.42
  6. Step 6: Final answer
    x = 16,977.39

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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.