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Finding the Fourth Proportional to 20,699.69, 28,566.03 and 11,268.26

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Solution

The fourth proportional to 20,699.69, 28,566.03 and 11,268.26 is: 15,550.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.69 : 28,566.03 = 11,268.26 : x
  2. Step 2: Convert to fraction form
    20,699.69/28,566.03 = 11,268.26/x
  3. Step 3: Cross multiply
    20,699.69x = 28,566.03 × 11,268.26
  4. Step 4: Simplify right side
    20,699.69x = 321,889,453.21
  5. Step 5: Solve for x
    x = 321,889,453.21/20,699.69
  6. Step 6: Final answer
    x = 15,550.45

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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.