Home / 5,091.50-7,638.60-1,628.75

Finding the Fourth Proportional to 5,091.50, 7,638.60 and 1,628.75

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Solution

The fourth proportional to 5,091.50, 7,638.60 and 1,628.75 is: 2,443.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,091.50 : 7,638.60 = 1,628.75 : x
  2. Step 2: Convert to fraction form
    5,091.50/7,638.60 = 1,628.75/x
  3. Step 3: Cross multiply
    5,091.50x = 7,638.60 × 1,628.75
  4. Step 4: Simplify right side
    5,091.50x = 12,441,369.75
  5. Step 5: Solve for x
    x = 12,441,369.75/5,091.50
  6. Step 6: Final answer
    x = 2,443.56

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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.