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Finding the Fourth Proportional to 31,605.60, 43,615.62 and 18,176.22

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Solution

The fourth proportional to 31,605.60, 43,615.62 and 18,176.22 is: 25,083.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,605.60 : 43,615.62 = 18,176.22 : x
  2. Step 2: Convert to fraction form
    31,605.60/43,615.62 = 18,176.22/x
  3. Step 3: Cross multiply
    31,605.60x = 43,615.62 × 18,176.22
  4. Step 4: Simplify right side
    31,605.60x = 792,767,104.56
  5. Step 5: Solve for x
    x = 792,767,104.56/31,605.60
  6. Step 6: Final answer
    x = 25,083.12

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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.