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Finding the Fourth Proportional to 31,578.60, 43,578.60 and 17,431.94

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Solution

The fourth proportional to 31,578.60, 43,578.60 and 17,431.94 is: 24,056.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.60 : 43,578.60 = 17,431.94 : x
  2. Step 2: Convert to fraction form
    31,578.60/43,578.60 = 17,431.94/x
  3. Step 3: Cross multiply
    31,578.60x = 43,578.60 × 17,431.94
  4. Step 4: Simplify right side
    31,578.60x = 759,659,540.48
  5. Step 5: Solve for x
    x = 759,659,540.48/31,578.60
  6. Step 6: Final answer
    x = 24,056.15

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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.