Home / 5,118.66-7,678.41-2,157.96

Finding the Fourth Proportional to 5,118.66, 7,678.41 and 2,157.96

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Solution

The fourth proportional to 5,118.66, 7,678.41 and 2,157.96 is: 3,237.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.66 : 7,678.41 = 2,157.96 : x
  2. Step 2: Convert to fraction form
    5,118.66/7,678.41 = 2,157.96/x
  3. Step 3: Cross multiply
    5,118.66x = 7,678.41 × 2,157.96
  4. Step 4: Simplify right side
    5,118.66x = 16,569,701.64
  5. Step 5: Solve for x
    x = 16,569,701.64/5,118.66
  6. Step 6: Final answer
    x = 3,237.12

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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.