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Finding the Fourth Proportional to 13,999.40, 20,982.90 and 5,675.30

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Solution

The fourth proportional to 13,999.40, 20,982.90 and 5,675.30 is: 8,506.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.40 : 20,982.90 = 5,675.30 : x
  2. Step 2: Convert to fraction form
    13,999.40/20,982.90 = 5,675.30/x
  3. Step 3: Cross multiply
    13,999.40x = 20,982.90 × 5,675.30
  4. Step 4: Simplify right side
    13,999.40x = 119,084,252.37
  5. Step 5: Solve for x
    x = 119,084,252.37/13,999.40
  6. Step 6: Final answer
    x = 8,506.38

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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.