Home / 18,788.20-28,183.74-5,639.56

Finding the Fourth Proportional to 18,788.20, 28,183.74 and 5,639.56

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Solution

The fourth proportional to 18,788.20, 28,183.74 and 5,639.56 is: 8,459.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.20 : 28,183.74 = 5,639.56 : x
  2. Step 2: Convert to fraction form
    18,788.20/28,183.74 = 5,639.56/x
  3. Step 3: Cross multiply
    18,788.20x = 28,183.74 × 5,639.56
  4. Step 4: Simplify right side
    18,788.20x = 158,943,892.75
  5. Step 5: Solve for x
    x = 158,943,892.75/18,788.20
  6. Step 6: Final answer
    x = 8,459.77

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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.