Home / 12,739.20-19,108.92-3,854.60

Finding the Fourth Proportional to 12,739.20, 19,108.92 and 3,854.60

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Solution

The fourth proportional to 12,739.20, 19,108.92 and 3,854.60 is: 5,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.20 : 19,108.92 = 3,854.60 : x
  2. Step 2: Convert to fraction form
    12,739.20/19,108.92 = 3,854.60/x
  3. Step 3: Cross multiply
    12,739.20x = 19,108.92 × 3,854.60
  4. Step 4: Simplify right side
    12,739.20x = 73,657,243.03
  5. Step 5: Solve for x
    x = 73,657,243.03/12,739.20
  6. Step 6: Final answer
    x = 5,781.94

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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.