Home / 18,881.40-26,060.94-11,431.80

Finding the Fourth Proportional to 18,881.40, 26,060.94 and 11,431.80

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Solution

The fourth proportional to 18,881.40, 26,060.94 and 11,431.80 is: 15,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.40 : 26,060.94 = 11,431.80 : x
  2. Step 2: Convert to fraction form
    18,881.40/26,060.94 = 11,431.80/x
  3. Step 3: Cross multiply
    18,881.40x = 26,060.94 × 11,431.80
  4. Step 4: Simplify right side
    18,881.40x = 297,923,453.89
  5. Step 5: Solve for x
    x = 297,923,453.89/18,881.40
  6. Step 6: Final answer
    x = 15,778.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.