Home / 3,126.60-4,690.80-1,876.86

Finding the Fourth Proportional to 3,126.60, 4,690.80 and 1,876.86

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Solution

The fourth proportional to 3,126.60, 4,690.80 and 1,876.86 is: 2,815.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.60 : 4,690.80 = 1,876.86 : x
  2. Step 2: Convert to fraction form
    3,126.60/4,690.80 = 1,876.86/x
  3. Step 3: Cross multiply
    3,126.60x = 4,690.80 × 1,876.86
  4. Step 4: Simplify right side
    3,126.60x = 8,803,974.89
  5. Step 5: Solve for x
    x = 8,803,974.89/3,126.60
  6. Step 6: Final answer
    x = 2,815.83

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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.