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Finding the Fourth Proportional to 12,751.98, 19,127.97 and 3,986.90

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Solution

The fourth proportional to 12,751.98, 19,127.97 and 3,986.90 is: 5,980.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.98 : 19,127.97 = 3,986.90 : x
  2. Step 2: Convert to fraction form
    12,751.98/19,127.97 = 3,986.90/x
  3. Step 3: Cross multiply
    12,751.98x = 19,127.97 × 3,986.90
  4. Step 4: Simplify right side
    12,751.98x = 76,261,303.59
  5. Step 5: Solve for x
    x = 76,261,303.59/12,751.98
  6. Step 6: Final answer
    x = 5,980.35

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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.