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Finding the Fourth Proportional to 13,111.98, 18,093.93 and 7,143.44

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Solution

The fourth proportional to 13,111.98, 18,093.93 and 7,143.44 is: 9,857.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.98 : 18,093.93 = 7,143.44 : x
  2. Step 2: Convert to fraction form
    13,111.98/18,093.93 = 7,143.44/x
  3. Step 3: Cross multiply
    13,111.98x = 18,093.93 × 7,143.44
  4. Step 4: Simplify right side
    13,111.98x = 129,252,928.02
  5. Step 5: Solve for x
    x = 129,252,928.02/13,111.98
  6. Step 6: Final answer
    x = 9,857.62

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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.