Home / 5,390.37-8,081.64-1,690.56

Finding the Fourth Proportional to 5,390.37, 8,081.64 and 1,690.56

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Solution

The fourth proportional to 5,390.37, 8,081.64 and 1,690.56 is: 2,534.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.37 : 8,081.64 = 1,690.56 : x
  2. Step 2: Convert to fraction form
    5,390.37/8,081.64 = 1,690.56/x
  3. Step 3: Cross multiply
    5,390.37x = 8,081.64 × 1,690.56
  4. Step 4: Simplify right side
    5,390.37x = 13,662,497.32
  5. Step 5: Solve for x
    x = 13,662,497.32/5,390.37
  6. Step 6: Final answer
    x = 2,534.61

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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.