Home / 13,979.21-19,271.49-9,993.39

Finding the Fourth Proportional to 13,979.21, 19,271.49 and 9,993.39

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Solution

The fourth proportional to 13,979.21, 19,271.49 and 9,993.39 is: 13,776.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.21 : 19,271.49 = 9,993.39 : x
  2. Step 2: Convert to fraction form
    13,979.21/19,271.49 = 9,993.39/x
  3. Step 3: Cross multiply
    13,979.21x = 19,271.49 × 9,993.39
  4. Step 4: Simplify right side
    13,979.21x = 192,587,515.45
  5. Step 5: Solve for x
    x = 192,587,515.45/13,979.21
  6. Step 6: Final answer
    x = 13,776.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.