Home / 5,103.78-7,657.87-2,142.98

Finding the Fourth Proportional to 5,103.78, 7,657.87 and 2,142.98

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Solution

The fourth proportional to 5,103.78, 7,657.87 and 2,142.98 is: 3,215.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,103.78 : 7,657.87 = 2,142.98 : x
  2. Step 2: Convert to fraction form
    5,103.78/7,657.87 = 2,142.98/x
  3. Step 3: Cross multiply
    5,103.78x = 7,657.87 × 2,142.98
  4. Step 4: Simplify right side
    5,103.78x = 16,410,666.85
  5. Step 5: Solve for x
    x = 16,410,666.85/5,103.78
  6. Step 6: Final answer
    x = 3,215.39

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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.