Home / 15,758.39-21,745.60-8,684.87

Finding the Fourth Proportional to 15,758.39, 21,745.60 and 8,684.87

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Solution

The fourth proportional to 15,758.39, 21,745.60 and 8,684.87 is: 11,984.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,758.39 : 21,745.60 = 8,684.87 : x
  2. Step 2: Convert to fraction form
    15,758.39/21,745.60 = 8,684.87/x
  3. Step 3: Cross multiply
    15,758.39x = 21,745.60 × 8,684.87
  4. Step 4: Simplify right side
    15,758.39x = 188,857,578.63
  5. Step 5: Solve for x
    x = 188,857,578.63/15,758.39
  6. Step 6: Final answer
    x = 11,984.57

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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.