Home / 4,989.38-7,485.87-2,138.67

Finding the Fourth Proportional to 4,989.38, 7,485.87 and 2,138.67

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Solution

The fourth proportional to 4,989.38, 7,485.87 and 2,138.67 is: 3,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.38 : 7,485.87 = 2,138.67 : x
  2. Step 2: Convert to fraction form
    4,989.38/7,485.87 = 2,138.67/x
  3. Step 3: Cross multiply
    4,989.38x = 7,485.87 × 2,138.67
  4. Step 4: Simplify right side
    4,989.38x = 16,009,801.58
  5. Step 5: Solve for x
    x = 16,009,801.58/4,989.38
  6. Step 6: Final answer
    x = 3,208.78

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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.