Home / 12,790.49-19,184.40-3,431.51

Finding the Fourth Proportional to 12,790.49, 19,184.40 and 3,431.51

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Solution

The fourth proportional to 12,790.49, 19,184.40 and 3,431.51 is: 5,146.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.49 : 19,184.40 = 3,431.51 : x
  2. Step 2: Convert to fraction form
    12,790.49/19,184.40 = 3,431.51/x
  3. Step 3: Cross multiply
    12,790.49x = 19,184.40 × 3,431.51
  4. Step 4: Simplify right side
    12,790.49x = 65,831,460.44
  5. Step 5: Solve for x
    x = 65,831,460.44/12,790.49
  6. Step 6: Final answer
    x = 5,146.91

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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.