Home / 5,120.16-7,683.23-2,158.42

Finding the Fourth Proportional to 5,120.16, 7,683.23 and 2,158.42

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Solution

The fourth proportional to 5,120.16, 7,683.23 and 2,158.42 is: 3,238.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.16 : 7,683.23 = 2,158.42 : x
  2. Step 2: Convert to fraction form
    5,120.16/7,683.23 = 2,158.42/x
  3. Step 3: Cross multiply
    5,120.16x = 7,683.23 × 2,158.42
  4. Step 4: Simplify right side
    5,120.16x = 16,583,645.71
  5. Step 5: Solve for x
    x = 16,583,645.71/5,120.16
  6. Step 6: Final answer
    x = 3,238.89

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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.