Home / 11,820.80-17,735.28-5,251.60

Finding the Fourth Proportional to 11,820.80, 17,735.28 and 5,251.60

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Solution

The fourth proportional to 11,820.80, 17,735.28 and 5,251.60 is: 7,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.80 : 17,735.28 = 5,251.60 : x
  2. Step 2: Convert to fraction form
    11,820.80/17,735.28 = 5,251.60/x
  3. Step 3: Cross multiply
    11,820.80x = 17,735.28 × 5,251.60
  4. Step 4: Simplify right side
    11,820.80x = 93,138,596.45
  5. Step 5: Solve for x
    x = 93,138,596.45/11,820.80
  6. Step 6: Final answer
    x = 7,879.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.