Home / 12,880.88-19,314.21-3,993.75

Finding the Fourth Proportional to 12,880.88, 19,314.21 and 3,993.75

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Solution

The fourth proportional to 12,880.88, 19,314.21 and 3,993.75 is: 5,988.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.88 : 19,314.21 = 3,993.75 : x
  2. Step 2: Convert to fraction form
    12,880.88/19,314.21 = 3,993.75/x
  3. Step 3: Cross multiply
    12,880.88x = 19,314.21 × 3,993.75
  4. Step 4: Simplify right side
    12,880.88x = 77,136,126.19
  5. Step 5: Solve for x
    x = 77,136,126.19/12,880.88
  6. Step 6: Final answer
    x = 5,988.42

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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.