Home / 20,784.89-28,684.62-11,832.40

Finding the Fourth Proportional to 20,784.89, 28,684.62 and 11,832.40

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Solution

The fourth proportional to 20,784.89, 28,684.62 and 11,832.40 is: 16,329.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.89 : 28,684.62 = 11,832.40 : x
  2. Step 2: Convert to fraction form
    20,784.89/28,684.62 = 11,832.40/x
  3. Step 3: Cross multiply
    20,784.89x = 28,684.62 × 11,832.40
  4. Step 4: Simplify right side
    20,784.89x = 339,407,897.69
  5. Step 5: Solve for x
    x = 339,407,897.69/20,784.89
  6. Step 6: Final answer
    x = 16,329.55

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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.