Home / 12,859.05-19,290-4,091.93

Finding the Fourth Proportional to 12,859.05, 19,290 and 4,091.93

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Solution

The fourth proportional to 12,859.05, 19,290 and 4,091.93 is: 6,138.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.05 : 19,290 = 4,091.93 : x
  2. Step 2: Convert to fraction form
    12,859.05/19,290 = 4,091.93/x
  3. Step 3: Cross multiply
    12,859.05x = 19,290 × 4,091.93
  4. Step 4: Simplify right side
    12,859.05x = 78,933,233.25
  5. Step 5: Solve for x
    x = 78,933,233.25/12,859.05
  6. Step 6: Final answer
    x = 6,138.34

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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.