Home / 19,115.78-28,668.20-7,426.26

Finding the Fourth Proportional to 19,115.78, 28,668.20 and 7,426.26

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Solution

The fourth proportional to 19,115.78, 28,668.20 and 7,426.26 is: 11,137.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,115.78 : 28,668.20 = 7,426.26 : x
  2. Step 2: Convert to fraction form
    19,115.78/28,668.20 = 7,426.26/x
  3. Step 3: Cross multiply
    19,115.78x = 28,668.20 × 7,426.26
  4. Step 4: Simplify right side
    19,115.78x = 212,897,469.80
  5. Step 5: Solve for x
    x = 212,897,469.80/19,115.78
  6. Step 6: Final answer
    x = 11,137.27

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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.