Home / 12,643.28-18,968.60-3,879.48

Finding the Fourth Proportional to 12,643.28, 18,968.60 and 3,879.48

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Solution

The fourth proportional to 12,643.28, 18,968.60 and 3,879.48 is: 5,820.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.28 : 18,968.60 = 3,879.48 : x
  2. Step 2: Convert to fraction form
    12,643.28/18,968.60 = 3,879.48/x
  3. Step 3: Cross multiply
    12,643.28x = 18,968.60 × 3,879.48
  4. Step 4: Simplify right side
    12,643.28x = 73,588,304.33
  5. Step 5: Solve for x
    x = 73,588,304.33/12,643.28
  6. Step 6: Final answer
    x = 5,820.35

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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.