Home / 5,380.21-8,065.45-1,916.65

Finding the Fourth Proportional to 5,380.21, 8,065.45 and 1,916.65

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Solution

The fourth proportional to 5,380.21, 8,065.45 and 1,916.65 is: 2,873.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.21 : 8,065.45 = 1,916.65 : x
  2. Step 2: Convert to fraction form
    5,380.21/8,065.45 = 1,916.65/x
  3. Step 3: Cross multiply
    5,380.21x = 8,065.45 × 1,916.65
  4. Step 4: Simplify right side
    5,380.21x = 15,458,657.22
  5. Step 5: Solve for x
    x = 15,458,657.22/5,380.21
  6. Step 6: Final answer
    x = 2,873.24

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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.