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Finding the Fourth Proportional to 13,999.75, 21,000.03 and 3,611.50

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Solution

The fourth proportional to 13,999.75, 21,000.03 and 3,611.50 is: 5,417.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.75 : 21,000.03 = 3,611.50 : x
  2. Step 2: Convert to fraction form
    13,999.75/21,000.03 = 3,611.50/x
  3. Step 3: Cross multiply
    13,999.75x = 21,000.03 × 3,611.50
  4. Step 4: Simplify right side
    13,999.75x = 75,841,608.35
  5. Step 5: Solve for x
    x = 75,841,608.35/13,999.75
  6. Step 6: Final answer
    x = 5,417.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.