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Finding the Fourth Proportional to 34,489.89, 51,736.05 and 13,431.51

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Solution

The fourth proportional to 34,489.89, 51,736.05 and 13,431.51 is: 20,147.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,489.89 : 51,736.05 = 13,431.51 : x
  2. Step 2: Convert to fraction form
    34,489.89/51,736.05 = 13,431.51/x
  3. Step 3: Cross multiply
    34,489.89x = 51,736.05 × 13,431.51
  4. Step 4: Simplify right side
    34,489.89x = 694,893,272.94
  5. Step 5: Solve for x
    x = 694,893,272.94/34,489.89
  6. Step 6: Final answer
    x = 20,147.74

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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.