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Finding the Fourth Proportional to 13,611, 18,724.86 and 13,027.80

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Solution

The fourth proportional to 13,611, 18,724.86 and 13,027.80 is: 17,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611 : 18,724.86 = 13,027.80 : x
  2. Step 2: Convert to fraction form
    13,611/18,724.86 = 13,027.80/x
  3. Step 3: Cross multiply
    13,611x = 18,724.86 × 13,027.80
  4. Step 4: Simplify right side
    13,611x = 243,943,731.11
  5. Step 5: Solve for x
    x = 243,943,731.11/13,611
  6. Step 6: Final answer
    x = 17,922.54

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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.