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Finding the Fourth Proportional to 19,365.50, 26,720.30 and 12,660.98

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Solution

The fourth proportional to 19,365.50, 26,720.30 and 12,660.98 is: 17,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,365.50 : 26,720.30 = 12,660.98 : x
  2. Step 2: Convert to fraction form
    19,365.50/26,720.30 = 12,660.98/x
  3. Step 3: Cross multiply
    19,365.50x = 26,720.30 × 12,660.98
  4. Step 4: Simplify right side
    19,365.50x = 338,305,183.89
  5. Step 5: Solve for x
    x = 338,305,183.89/19,365.50
  6. Step 6: Final answer
    x = 17,469.48

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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.