Home / 12,078.84-18,118.26-3,313.86

Finding the Fourth Proportional to 12,078.84, 18,118.26 and 3,313.86

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Solution

The fourth proportional to 12,078.84, 18,118.26 and 3,313.86 is: 4,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.84 : 18,118.26 = 3,313.86 : x
  2. Step 2: Convert to fraction form
    12,078.84/18,118.26 = 3,313.86/x
  3. Step 3: Cross multiply
    12,078.84x = 18,118.26 × 3,313.86
  4. Step 4: Simplify right side
    12,078.84x = 60,041,377.08
  5. Step 5: Solve for x
    x = 60,041,377.08/12,078.84
  6. Step 6: Final answer
    x = 4,970.79

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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.