Home / 5,120.35-7,683.46-2,158.58

Finding the Fourth Proportional to 5,120.35, 7,683.46 and 2,158.58

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Solution

The fourth proportional to 5,120.35, 7,683.46 and 2,158.58 is: 3,239.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.35 : 7,683.46 = 2,158.58 : x
  2. Step 2: Convert to fraction form
    5,120.35/7,683.46 = 2,158.58/x
  3. Step 3: Cross multiply
    5,120.35x = 7,683.46 × 2,158.58
  4. Step 4: Simplify right side
    5,120.35x = 16,585,376.90
  5. Step 5: Solve for x
    x = 16,585,376.90/5,120.35
  6. Step 6: Final answer
    x = 3,239.11

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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.