Home / 20,509.45-30,743.73-8,666.21

Finding the Fourth Proportional to 20,509.45, 30,743.73 and 8,666.21

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Solution

The fourth proportional to 20,509.45, 30,743.73 and 8,666.21 is: 12,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.45 : 30,743.73 = 8,666.21 : x
  2. Step 2: Convert to fraction form
    20,509.45/30,743.73 = 8,666.21/x
  3. Step 3: Cross multiply
    20,509.45x = 30,743.73 × 8,666.21
  4. Step 4: Simplify right side
    20,509.45x = 266,431,620.36
  5. Step 5: Solve for x
    x = 266,431,620.36/20,509.45
  6. Step 6: Final answer
    x = 12,990.68

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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.