Home / 5,120.47-7,683.69-2,158.73

Finding the Fourth Proportional to 5,120.47, 7,683.69 and 2,158.73

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Solution

The fourth proportional to 5,120.47, 7,683.69 and 2,158.73 is: 3,239.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.47 : 7,683.69 = 2,158.73 : x
  2. Step 2: Convert to fraction form
    5,120.47/7,683.69 = 2,158.73/x
  3. Step 3: Cross multiply
    5,120.47x = 7,683.69 × 2,158.73
  4. Step 4: Simplify right side
    5,120.47x = 16,587,010.60
  5. Step 5: Solve for x
    x = 16,587,010.60/5,120.47
  6. Step 6: Final answer
    x = 3,239.35

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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.