Home / 20,782.89-31,169.88-5,989.05

Finding the Fourth Proportional to 20,782.89, 31,169.88 and 5,989.05

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Solution

The fourth proportional to 20,782.89, 31,169.88 and 5,989.05 is: 8,982.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.89 : 31,169.88 = 5,989.05 : x
  2. Step 2: Convert to fraction form
    20,782.89/31,169.88 = 5,989.05/x
  3. Step 3: Cross multiply
    20,782.89x = 31,169.88 × 5,989.05
  4. Step 4: Simplify right side
    20,782.89x = 186,677,969.81
  5. Step 5: Solve for x
    x = 186,677,969.81/20,782.89
  6. Step 6: Final answer
    x = 8,982.29

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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.