Home / 20,520.76-30,756.84-9,418.09

Finding the Fourth Proportional to 20,520.76, 30,756.84 and 9,418.09

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Solution

The fourth proportional to 20,520.76, 30,756.84 and 9,418.09 is: 14,115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.76 : 30,756.84 = 9,418.09 : x
  2. Step 2: Convert to fraction form
    20,520.76/30,756.84 = 9,418.09/x
  3. Step 3: Cross multiply
    20,520.76x = 30,756.84 × 9,418.09
  4. Step 4: Simplify right side
    20,520.76x = 289,670,687.24
  5. Step 5: Solve for x
    x = 289,670,687.24/20,520.76
  6. Step 6: Final answer
    x = 14,115.98

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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.