Home / 20,665.14-30,980.44-9,579.75

Finding the Fourth Proportional to 20,665.14, 30,980.44 and 9,579.75

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Solution

The fourth proportional to 20,665.14, 30,980.44 and 9,579.75 is: 14,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.14 : 30,980.44 = 9,579.75 : x
  2. Step 2: Convert to fraction form
    20,665.14/30,980.44 = 9,579.75/x
  3. Step 3: Cross multiply
    20,665.14x = 30,980.44 × 9,579.75
  4. Step 4: Simplify right side
    20,665.14x = 296,784,870.09
  5. Step 5: Solve for x
    x = 296,784,870.09/20,665.14
  6. Step 6: Final answer
    x = 14,361.62

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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.