Home / 12,579.05-18,870.99-4,787.24

Finding the Fourth Proportional to 12,579.05, 18,870.99 and 4,787.24

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Solution

The fourth proportional to 12,579.05, 18,870.99 and 4,787.24 is: 7,181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.05 : 18,870.99 = 4,787.24 : x
  2. Step 2: Convert to fraction form
    12,579.05/18,870.99 = 4,787.24/x
  3. Step 3: Cross multiply
    12,579.05x = 18,870.99 × 4,787.24
  4. Step 4: Simplify right side
    12,579.05x = 90,339,958.17
  5. Step 5: Solve for x
    x = 90,339,958.17/12,579.05
  6. Step 6: Final answer
    x = 7,181.78

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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.