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Finding the Fourth Proportional to 31,290.69, 43,173.68 and 18,541.68

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Solution

The fourth proportional to 31,290.69, 43,173.68 and 18,541.68 is: 25,583.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,290.69 : 43,173.68 = 18,541.68 : x
  2. Step 2: Convert to fraction form
    31,290.69/43,173.68 = 18,541.68/x
  3. Step 3: Cross multiply
    31,290.69x = 43,173.68 × 18,541.68
  4. Step 4: Simplify right side
    31,290.69x = 800,512,304.37
  5. Step 5: Solve for x
    x = 800,512,304.37/31,290.69
  6. Step 6: Final answer
    x = 25,583.08

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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.