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Finding the Fourth Proportional to 13,393.50, 18,483 and 8,087.28

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Solution

The fourth proportional to 13,393.50, 18,483 and 8,087.28 is: 11,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.50 : 18,483 = 8,087.28 : x
  2. Step 2: Convert to fraction form
    13,393.50/18,483 = 8,087.28/x
  3. Step 3: Cross multiply
    13,393.50x = 18,483 × 8,087.28
  4. Step 4: Simplify right side
    13,393.50x = 149,477,196.24
  5. Step 5: Solve for x
    x = 149,477,196.24/13,393.50
  6. Step 6: Final answer
    x = 11,160.43

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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.