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Finding the Fourth Proportional to 5,879.72, 8,819.60 and 1,986.84

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Solution

The fourth proportional to 5,879.72, 8,819.60 and 1,986.84 is: 2,980.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,879.72 : 8,819.60 = 1,986.84 : x
  2. Step 2: Convert to fraction form
    5,879.72/8,819.60 = 1,986.84/x
  3. Step 3: Cross multiply
    5,879.72x = 8,819.60 × 1,986.84
  4. Step 4: Simplify right side
    5,879.72x = 17,523,134.06
  5. Step 5: Solve for x
    x = 17,523,134.06/5,879.72
  6. Step 6: Final answer
    x = 2,980.27

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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.