Home / 12,400.86-18,600.36-4,080.78

Finding the Fourth Proportional to 12,400.86, 18,600.36 and 4,080.78

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Solution

The fourth proportional to 12,400.86, 18,600.36 and 4,080.78 is: 6,120.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.86 : 18,600.36 = 4,080.78 : x
  2. Step 2: Convert to fraction form
    12,400.86/18,600.36 = 4,080.78/x
  3. Step 3: Cross multiply
    12,400.86x = 18,600.36 × 4,080.78
  4. Step 4: Simplify right side
    12,400.86x = 75,903,977.08
  5. Step 5: Solve for x
    x = 75,903,977.08/12,400.86
  6. Step 6: Final answer
    x = 6,120.86

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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.