Home / 9,120.35-13,638.83-6,629.90

Finding the Fourth Proportional to 9,120.35, 13,638.83 and 6,629.90

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Solution

The fourth proportional to 9,120.35, 13,638.83 and 6,629.90 is: 9,914.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.35 : 13,638.83 = 6,629.90 : x
  2. Step 2: Convert to fraction form
    9,120.35/13,638.83 = 6,629.90/x
  3. Step 3: Cross multiply
    9,120.35x = 13,638.83 × 6,629.90
  4. Step 4: Simplify right side
    9,120.35x = 90,424,129.69
  5. Step 5: Solve for x
    x = 90,424,129.69/9,120.35
  6. Step 6: Final answer
    x = 9,914.55

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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.