Home / 13,933.38-20,905.41-8,390.69

Finding the Fourth Proportional to 13,933.38, 20,905.41 and 8,390.69

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Solution

The fourth proportional to 13,933.38, 20,905.41 and 8,390.69 is: 12,589.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,933.38 : 20,905.41 = 8,390.69 : x
  2. Step 2: Convert to fraction form
    13,933.38/20,905.41 = 8,390.69/x
  3. Step 3: Cross multiply
    13,933.38x = 20,905.41 × 8,390.69
  4. Step 4: Simplify right side
    13,933.38x = 175,410,762.37
  5. Step 5: Solve for x
    x = 175,410,762.37/13,933.38
  6. Step 6: Final answer
    x = 12,589.24

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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.