Home / 21,311.85-31,968.39-6,520.44

Finding the Fourth Proportional to 21,311.85, 31,968.39 and 6,520.44

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Solution

The fourth proportional to 21,311.85, 31,968.39 and 6,520.44 is: 9,780.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.85 : 31,968.39 = 6,520.44 : x
  2. Step 2: Convert to fraction form
    21,311.85/31,968.39 = 6,520.44/x
  3. Step 3: Cross multiply
    21,311.85x = 31,968.39 × 6,520.44
  4. Step 4: Simplify right side
    21,311.85x = 208,448,076.55
  5. Step 5: Solve for x
    x = 208,448,076.55/21,311.85
  6. Step 6: Final answer
    x = 9,780.85

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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.