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Finding the Fourth Proportional to 6,638.95, 9,102.35 and 6,520.49

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Solution

The fourth proportional to 6,638.95, 9,102.35 and 6,520.49 is: 8,939.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.95 : 9,102.35 = 6,520.49 : x
  2. Step 2: Convert to fraction form
    6,638.95/9,102.35 = 6,520.49/x
  3. Step 3: Cross multiply
    6,638.95x = 9,102.35 × 6,520.49
  4. Step 4: Simplify right side
    6,638.95x = 59,351,782.15
  5. Step 5: Solve for x
    x = 59,351,782.15/6,638.95
  6. Step 6: Final answer
    x = 8,939.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.