Home / 12,405.60-18,608.40-3,171.60

Finding the Fourth Proportional to 12,405.60, 18,608.40 and 3,171.60

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Solution

The fourth proportional to 12,405.60, 18,608.40 and 3,171.60 is: 4,757.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.60 : 18,608.40 = 3,171.60 : x
  2. Step 2: Convert to fraction form
    12,405.60/18,608.40 = 3,171.60/x
  3. Step 3: Cross multiply
    12,405.60x = 18,608.40 × 3,171.60
  4. Step 4: Simplify right side
    12,405.60x = 59,018,401.44
  5. Step 5: Solve for x
    x = 59,018,401.44/12,405.60
  6. Step 6: Final answer
    x = 4,757.40

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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.