Home / 12,579.94-18,870.09-4,789.18

Finding the Fourth Proportional to 12,579.94, 18,870.09 and 4,789.18

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Solution

The fourth proportional to 12,579.94, 18,870.09 and 4,789.18 is: 7,183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.94 : 18,870.09 = 4,789.18 : x
  2. Step 2: Convert to fraction form
    12,579.94/18,870.09 = 4,789.18/x
  3. Step 3: Cross multiply
    12,579.94x = 18,870.09 × 4,789.18
  4. Step 4: Simplify right side
    12,579.94x = 90,372,257.63
  5. Step 5: Solve for x
    x = 90,372,257.63/12,579.94
  6. Step 6: Final answer
    x = 7,183.84

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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.