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Finding the Fourth Proportional to 13,763.80, 20,651.10 and 4,999.60

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Solution

The fourth proportional to 13,763.80, 20,651.10 and 4,999.60 is: 7,501.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,763.80 : 20,651.10 = 4,999.60 : x
  2. Step 2: Convert to fraction form
    13,763.80/20,651.10 = 4,999.60/x
  3. Step 3: Cross multiply
    13,763.80x = 20,651.10 × 4,999.60
  4. Step 4: Simplify right side
    13,763.80x = 103,247,239.56
  5. Step 5: Solve for x
    x = 103,247,239.56/13,763.80
  6. Step 6: Final answer
    x = 7,501.36

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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.