Home / 12,391.19-18,558.21-7,449.97

Finding the Fourth Proportional to 12,391.19, 18,558.21 and 7,449.97

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Solution

The fourth proportional to 12,391.19, 18,558.21 and 7,449.97 is: 11,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.19 : 18,558.21 = 7,449.97 : x
  2. Step 2: Convert to fraction form
    12,391.19/18,558.21 = 7,449.97/x
  3. Step 3: Cross multiply
    12,391.19x = 18,558.21 × 7,449.97
  4. Step 4: Simplify right side
    12,391.19x = 138,258,014.96
  5. Step 5: Solve for x
    x = 138,258,014.96/12,391.19
  6. Step 6: Final answer
    x = 11,157.77

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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.