Home / 20,690.25-30,975.53-18,553.67

Finding the Fourth Proportional to 20,690.25, 30,975.53 and 18,553.67

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Solution

The fourth proportional to 20,690.25, 30,975.53 and 18,553.67 is: 27,776.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.25 : 30,975.53 = 18,553.67 : x
  2. Step 2: Convert to fraction form
    20,690.25/30,975.53 = 18,553.67/x
  3. Step 3: Cross multiply
    20,690.25x = 30,975.53 × 18,553.67
  4. Step 4: Simplify right side
    20,690.25x = 574,709,630.21
  5. Step 5: Solve for x
    x = 574,709,630.21/20,690.25
  6. Step 6: Final answer
    x = 27,776.84

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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.