Home / 12,408.47-18,608.75-4,086.63

Finding the Fourth Proportional to 12,408.47, 18,608.75 and 4,086.63

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Solution

The fourth proportional to 12,408.47, 18,608.75 and 4,086.63 is: 6,128.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.47 : 18,608.75 = 4,086.63 : x
  2. Step 2: Convert to fraction form
    12,408.47/18,608.75 = 4,086.63/x
  3. Step 3: Cross multiply
    12,408.47x = 18,608.75 × 4,086.63
  4. Step 4: Simplify right side
    12,408.47x = 76,047,055.58
  5. Step 5: Solve for x
    x = 76,047,055.58/12,408.47
  6. Step 6: Final answer
    x = 6,128.64

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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.