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Finding the Fourth Proportional to 6,392.50, 8,821.63 and 3,559.91

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Solution

The fourth proportional to 6,392.50, 8,821.63 and 3,559.91 is: 4,912.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.50 : 8,821.63 = 3,559.91 : x
  2. Step 2: Convert to fraction form
    6,392.50/8,821.63 = 3,559.91/x
  3. Step 3: Cross multiply
    6,392.50x = 8,821.63 × 3,559.91
  4. Step 4: Simplify right side
    6,392.50x = 31,404,208.85
  5. Step 5: Solve for x
    x = 31,404,208.85/6,392.50
  6. Step 6: Final answer
    x = 4,912.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.