Home / 20,852.78-31,279.57-6,812.84

Finding the Fourth Proportional to 20,852.78, 31,279.57 and 6,812.84

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Solution

The fourth proportional to 20,852.78, 31,279.57 and 6,812.84 is: 10,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.78 : 31,279.57 = 6,812.84 : x
  2. Step 2: Convert to fraction form
    20,852.78/31,279.57 = 6,812.84/x
  3. Step 3: Cross multiply
    20,852.78x = 31,279.57 × 6,812.84
  4. Step 4: Simplify right side
    20,852.78x = 213,102,766.85
  5. Step 5: Solve for x
    x = 213,102,766.85/20,852.78
  6. Step 6: Final answer
    x = 10,219.40

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1.5x scale

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.