Home / 20,816.21-28,723.80-13,259.44

Finding the Fourth Proportional to 20,816.21, 28,723.80 and 13,259.44

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Solution

The fourth proportional to 20,816.21, 28,723.80 and 13,259.44 is: 18,296.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.21 : 28,723.80 = 13,259.44 : x
  2. Step 2: Convert to fraction form
    20,816.21/28,723.80 = 13,259.44/x
  3. Step 3: Cross multiply
    20,816.21x = 28,723.80 × 13,259.44
  4. Step 4: Simplify right side
    20,816.21x = 380,861,538.58
  5. Step 5: Solve for x
    x = 380,861,538.58/20,816.21
  6. Step 6: Final answer
    x = 18,296.39

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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.