Home / 20,783.08-28,680.60-11,351.62

Finding the Fourth Proportional to 20,783.08, 28,680.60 and 11,351.62

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Solution

The fourth proportional to 20,783.08, 28,680.60 and 11,351.62 is: 15,665.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.08 : 28,680.60 = 11,351.62 : x
  2. Step 2: Convert to fraction form
    20,783.08/28,680.60 = 11,351.62/x
  3. Step 3: Cross multiply
    20,783.08x = 28,680.60 × 11,351.62
  4. Step 4: Simplify right side
    20,783.08x = 325,571,272.57
  5. Step 5: Solve for x
    x = 325,571,272.57/20,783.08
  6. Step 6: Final answer
    x = 15,665.21

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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.