Home / 20,783.54-28,680.87-11,830.85

Finding the Fourth Proportional to 20,783.54, 28,680.87 and 11,830.85

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Solution

The fourth proportional to 20,783.54, 28,680.87 and 11,830.85 is: 16,326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.54 : 28,680.87 = 11,830.85 : x
  2. Step 2: Convert to fraction form
    20,783.54/28,680.87 = 11,830.85/x
  3. Step 3: Cross multiply
    20,783.54x = 28,680.87 × 11,830.85
  4. Step 4: Simplify right side
    20,783.54x = 339,319,070.84
  5. Step 5: Solve for x
    x = 339,319,070.84/20,783.54
  6. Step 6: Final answer
    x = 16,326.34

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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.