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Finding the Fourth Proportional to 6,623.06, 9,139.64 and 3,638.88

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Solution

The fourth proportional to 6,623.06, 9,139.64 and 3,638.88 is: 5,021.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.06 : 9,139.64 = 3,638.88 : x
  2. Step 2: Convert to fraction form
    6,623.06/9,139.64 = 3,638.88/x
  3. Step 3: Cross multiply
    6,623.06x = 9,139.64 × 3,638.88
  4. Step 4: Simplify right side
    6,623.06x = 33,258,035.01
  5. Step 5: Solve for x
    x = 33,258,035.01/6,623.06
  6. Step 6: Final answer
    x = 5,021.56

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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.