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Finding the Fourth Proportional to 13,391.50, 18,480.25 and 8,085.26

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Solution

The fourth proportional to 13,391.50, 18,480.25 and 8,085.26 is: 11,157.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.50 : 18,480.25 = 8,085.26 : x
  2. Step 2: Convert to fraction form
    13,391.50/18,480.25 = 8,085.26/x
  3. Step 3: Cross multiply
    13,391.50x = 18,480.25 × 8,085.26
  4. Step 4: Simplify right side
    13,391.50x = 149,417,626.12
  5. Step 5: Solve for x
    x = 149,417,626.12/13,391.50
  6. Step 6: Final answer
    x = 11,157.65

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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.