Home / 3,105.60-4,284.64-1,986.72

Finding the Fourth Proportional to 3,105.60, 4,284.64 and 1,986.72

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Solution

The fourth proportional to 3,105.60, 4,284.64 and 1,986.72 is: 2,740.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.60 : 4,284.64 = 1,986.72 : x
  2. Step 2: Convert to fraction form
    3,105.60/4,284.64 = 1,986.72/x
  3. Step 3: Cross multiply
    3,105.60x = 4,284.64 × 1,986.72
  4. Step 4: Simplify right side
    3,105.60x = 8,512,379.98
  5. Step 5: Solve for x
    x = 8,512,379.98/3,105.60
  6. Step 6: Final answer
    x = 2,740.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.