Home / 20,869.58-31,309.46-6,078.64

Finding the Fourth Proportional to 20,869.58, 31,309.46 and 6,078.64

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Solution

The fourth proportional to 20,869.58, 31,309.46 and 6,078.64 is: 9,119.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.58 : 31,309.46 = 6,078.64 : x
  2. Step 2: Convert to fraction form
    20,869.58/31,309.46 = 6,078.64/x
  3. Step 3: Cross multiply
    20,869.58x = 31,309.46 × 6,078.64
  4. Step 4: Simplify right side
    20,869.58x = 190,318,935.93
  5. Step 5: Solve for x
    x = 190,318,935.93/20,869.58
  6. Step 6: Final answer
    x = 9,119.44

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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.