Home / 12,790.76-19,186.36-3,906.28

Finding the Fourth Proportional to 12,790.76, 19,186.36 and 3,906.28

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Solution

The fourth proportional to 12,790.76, 19,186.36 and 3,906.28 is: 5,859.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.76 : 19,186.36 = 3,906.28 : x
  2. Step 2: Convert to fraction form
    12,790.76/19,186.36 = 3,906.28/x
  3. Step 3: Cross multiply
    12,790.76x = 19,186.36 × 3,906.28
  4. Step 4: Simplify right side
    12,790.76x = 74,947,294.34
  5. Step 5: Solve for x
    x = 74,947,294.34/12,790.76
  6. Step 6: Final answer
    x = 5,859.49

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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.