Home / 5,380.08-8,071.20-1,917.60

Finding the Fourth Proportional to 5,380.08, 8,071.20 and 1,917.60

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Solution

The fourth proportional to 5,380.08, 8,071.20 and 1,917.60 is: 2,876.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.08 : 8,071.20 = 1,917.60 : x
  2. Step 2: Convert to fraction form
    5,380.08/8,071.20 = 1,917.60/x
  3. Step 3: Cross multiply
    5,380.08x = 8,071.20 × 1,917.60
  4. Step 4: Simplify right side
    5,380.08x = 15,477,333.12
  5. Step 5: Solve for x
    x = 15,477,333.12/5,380.08
  6. Step 6: Final answer
    x = 2,876.78

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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.