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Finding the Fourth Proportional to 13,391, 18,480.06 and 8,084.78

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Solution

The fourth proportional to 13,391, 18,480.06 and 8,084.78 is: 11,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391 : 18,480.06 = 8,084.78 : x
  2. Step 2: Convert to fraction form
    13,391/18,480.06 = 8,084.78/x
  3. Step 3: Cross multiply
    13,391x = 18,480.06 × 8,084.78
  4. Step 4: Simplify right side
    13,391x = 149,407,219.49
  5. Step 5: Solve for x
    x = 149,407,219.49/13,391
  6. Step 6: Final answer
    x = 11,157.29

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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.