Home / 20,523.51-30,800.25-15,855.21

Finding the Fourth Proportional to 20,523.51, 30,800.25 and 15,855.21

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Solution

The fourth proportional to 20,523.51, 30,800.25 and 15,855.21 is: 23,794.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.51 : 30,800.25 = 15,855.21 : x
  2. Step 2: Convert to fraction form
    20,523.51/30,800.25 = 15,855.21/x
  3. Step 3: Cross multiply
    20,523.51x = 30,800.25 × 15,855.21
  4. Step 4: Simplify right side
    20,523.51x = 488,344,431.80
  5. Step 5: Solve for x
    x = 488,344,431.80/20,523.51
  6. Step 6: Final answer
    x = 23,794.39

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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.