Home / 20,782.72-31,178.88-5,991.84

Finding the Fourth Proportional to 20,782.72, 31,178.88 and 5,991.84

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Solution

The fourth proportional to 20,782.72, 31,178.88 and 5,991.84 is: 8,989.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.72 : 31,178.88 = 5,991.84 : x
  2. Step 2: Convert to fraction form
    20,782.72/31,178.88 = 5,991.84/x
  3. Step 3: Cross multiply
    20,782.72x = 31,178.88 × 5,991.84
  4. Step 4: Simplify right side
    20,782.72x = 186,818,860.34
  5. Step 5: Solve for x
    x = 186,818,860.34/20,782.72
  6. Step 6: Final answer
    x = 8,989.14

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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.