Home / 12,389.72-18,579.33-4,992.19

Finding the Fourth Proportional to 12,389.72, 18,579.33 and 4,992.19

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Solution

The fourth proportional to 12,389.72, 18,579.33 and 4,992.19 is: 7,486.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.72 : 18,579.33 = 4,992.19 : x
  2. Step 2: Convert to fraction form
    12,389.72/18,579.33 = 4,992.19/x
  3. Step 3: Cross multiply
    12,389.72x = 18,579.33 × 4,992.19
  4. Step 4: Simplify right side
    12,389.72x = 92,751,452.54
  5. Step 5: Solve for x
    x = 92,751,452.54/12,389.72
  6. Step 6: Final answer
    x = 7,486.17

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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.