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Finding the Fourth Proportional to 15,058.16, 20,781.44 and 8,344.43

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Solution

The fourth proportional to 15,058.16, 20,781.44 and 8,344.43 is: 11,515.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,058.16 : 20,781.44 = 8,344.43 : x
  2. Step 2: Convert to fraction form
    15,058.16/20,781.44 = 8,344.43/x
  3. Step 3: Cross multiply
    15,058.16x = 20,781.44 × 8,344.43
  4. Step 4: Simplify right side
    15,058.16x = 173,409,188.33
  5. Step 5: Solve for x
    x = 173,409,188.33/15,058.16
  6. Step 6: Final answer
    x = 11,515.97

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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.