Home / 18,429.87-25,425.20-11,711.90

Finding the Fourth Proportional to 18,429.87, 25,425.20 and 11,711.90

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Solution

The fourth proportional to 18,429.87, 25,425.20 and 11,711.90 is: 16,157.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.87 : 25,425.20 = 11,711.90 : x
  2. Step 2: Convert to fraction form
    18,429.87/25,425.20 = 11,711.90/x
  3. Step 3: Cross multiply
    18,429.87x = 25,425.20 × 11,711.90
  4. Step 4: Simplify right side
    18,429.87x = 297,777,272.75
  5. Step 5: Solve for x
    x = 297,777,272.75/18,429.87
  6. Step 6: Final answer
    x = 16,157.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.