Home / 20,517.40-30,751.44-8,666.56

Finding the Fourth Proportional to 20,517.40, 30,751.44 and 8,666.56

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Solution

The fourth proportional to 20,517.40, 30,751.44 and 8,666.56 is: 12,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.40 : 30,751.44 = 8,666.56 : x
  2. Step 2: Convert to fraction form
    20,517.40/30,751.44 = 8,666.56/x
  3. Step 3: Cross multiply
    20,517.40x = 30,751.44 × 8,666.56
  4. Step 4: Simplify right side
    20,517.40x = 266,509,199.85
  5. Step 5: Solve for x
    x = 266,509,199.85/20,517.40
  6. Step 6: Final answer
    x = 12,989.42

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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.