Home / 20,692.81-30,979.37-18,556.23

Finding the Fourth Proportional to 20,692.81, 30,979.37 and 18,556.23

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Solution

The fourth proportional to 20,692.81, 30,979.37 and 18,556.23 is: 27,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.81 : 30,979.37 = 18,556.23 : x
  2. Step 2: Convert to fraction form
    20,692.81/30,979.37 = 18,556.23/x
  3. Step 3: Cross multiply
    20,692.81x = 30,979.37 × 18,556.23
  4. Step 4: Simplify right side
    20,692.81x = 574,860,314.98
  5. Step 5: Solve for x
    x = 574,860,314.98/20,692.81
  6. Step 6: Final answer
    x = 27,780.68

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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.