Home / 12,739.40-19,109.93-3,379.28

Finding the Fourth Proportional to 12,739.40, 19,109.93 and 3,379.28

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Solution

The fourth proportional to 12,739.40, 19,109.93 and 3,379.28 is: 5,069.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.40 : 19,109.93 = 3,379.28 : x
  2. Step 2: Convert to fraction form
    12,739.40/19,109.93 = 3,379.28/x
  3. Step 3: Cross multiply
    12,739.40x = 19,109.93 × 3,379.28
  4. Step 4: Simplify right side
    12,739.40x = 64,577,691.80
  5. Step 5: Solve for x
    x = 64,577,691.80/12,739.40
  6. Step 6: Final answer
    x = 5,069.13

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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.