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Finding the Fourth Proportional to 6,622.98, 9,140.16 and 3,638.76

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Solution

The fourth proportional to 6,622.98, 9,140.16 and 3,638.76 is: 5,021.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.98 : 9,140.16 = 3,638.76 : x
  2. Step 2: Convert to fraction form
    6,622.98/9,140.16 = 3,638.76/x
  3. Step 3: Cross multiply
    6,622.98x = 9,140.16 × 3,638.76
  4. Step 4: Simplify right side
    6,622.98x = 33,258,848.60
  5. Step 5: Solve for x
    x = 33,258,848.60/6,622.98
  6. Step 6: Final answer
    x = 5,021.73

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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.