Home / 20,913.68-31,375.40-6,122.84

Finding the Fourth Proportional to 20,913.68, 31,375.40 and 6,122.84

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Solution

The fourth proportional to 20,913.68, 31,375.40 and 6,122.84 is: 9,185.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.68 : 31,375.40 = 6,122.84 : x
  2. Step 2: Convert to fraction form
    20,913.68/31,375.40 = 6,122.84/x
  3. Step 3: Cross multiply
    20,913.68x = 31,375.40 × 6,122.84
  4. Step 4: Simplify right side
    20,913.68x = 192,106,554.14
  5. Step 5: Solve for x
    x = 192,106,554.14/20,913.68
  6. Step 6: Final answer
    x = 9,185.69

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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.