Home / 12,751.72-19,127.54-3,986.64

Finding the Fourth Proportional to 12,751.72, 19,127.54 and 3,986.64

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Solution

The fourth proportional to 12,751.72, 19,127.54 and 3,986.64 is: 5,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.72 : 19,127.54 = 3,986.64 : x
  2. Step 2: Convert to fraction form
    12,751.72/19,127.54 = 3,986.64/x
  3. Step 3: Cross multiply
    12,751.72x = 19,127.54 × 3,986.64
  4. Step 4: Simplify right side
    12,751.72x = 76,254,616.07
  5. Step 5: Solve for x
    x = 76,254,616.07/12,751.72
  6. Step 6: Final answer
    x = 5,979.95

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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.