Home / 12,751.46-19,127.19-3,986.42

Finding the Fourth Proportional to 12,751.46, 19,127.19 and 3,986.42

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Solution

The fourth proportional to 12,751.46, 19,127.19 and 3,986.42 is: 5,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.46 : 19,127.19 = 3,986.42 : x
  2. Step 2: Convert to fraction form
    12,751.46/19,127.19 = 3,986.42/x
  3. Step 3: Cross multiply
    12,751.46x = 19,127.19 × 3,986.42
  4. Step 4: Simplify right side
    12,751.46x = 76,249,012.76
  5. Step 5: Solve for x
    x = 76,249,012.76/12,751.46
  6. Step 6: Final answer
    x = 5,979.63

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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.