Home / 8,621.98-12,933.64-2,778.76

Finding the Fourth Proportional to 8,621.98, 12,933.64 and 2,778.76

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Solution

The fourth proportional to 8,621.98, 12,933.64 and 2,778.76 is: 4,168.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.98 : 12,933.64 = 2,778.76 : x
  2. Step 2: Convert to fraction form
    8,621.98/12,933.64 = 2,778.76/x
  3. Step 3: Cross multiply
    8,621.98x = 12,933.64 × 2,778.76
  4. Step 4: Simplify right side
    8,621.98x = 35,939,481.49
  5. Step 5: Solve for x
    x = 35,939,481.49/8,621.98
  6. Step 6: Final answer
    x = 4,168.36

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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.