Home / 20,383.93-28,129.48-11,890.99

Finding the Fourth Proportional to 20,383.93, 28,129.48 and 11,890.99

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Solution

The fourth proportional to 20,383.93, 28,129.48 and 11,890.99 is: 16,409.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.93 : 28,129.48 = 11,890.99 : x
  2. Step 2: Convert to fraction form
    20,383.93/28,129.48 = 11,890.99/x
  3. Step 3: Cross multiply
    20,383.93x = 28,129.48 × 11,890.99
  4. Step 4: Simplify right side
    20,383.93x = 334,487,365.39
  5. Step 5: Solve for x
    x = 334,487,365.39/20,383.93
  6. Step 6: Final answer
    x = 16,409.37

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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.