Home / 20,868.84-31,300.74-5,286.60

Finding the Fourth Proportional to 20,868.84, 31,300.74 and 5,286.60

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Solution

The fourth proportional to 20,868.84, 31,300.74 and 5,286.60 is: 7,929.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.84 : 31,300.74 = 5,286.60 : x
  2. Step 2: Convert to fraction form
    20,868.84/31,300.74 = 5,286.60/x
  3. Step 3: Cross multiply
    20,868.84x = 31,300.74 × 5,286.60
  4. Step 4: Simplify right side
    20,868.84x = 165,474,492.08
  5. Step 5: Solve for x
    x = 165,474,492.08/20,868.84
  6. Step 6: Final answer
    x = 7,929.26

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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.