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Finding the Fourth Proportional to 7,628.72, 11,424.72 and 4,333.76

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Solution

The fourth proportional to 7,628.72, 11,424.72 and 4,333.76 is: 6,490.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,628.72 : 11,424.72 = 4,333.76 : x
  2. Step 2: Convert to fraction form
    7,628.72/11,424.72 = 4,333.76/x
  3. Step 3: Cross multiply
    7,628.72x = 11,424.72 × 4,333.76
  4. Step 4: Simplify right side
    7,628.72x = 49,511,994.55
  5. Step 5: Solve for x
    x = 49,511,994.55/7,628.72
  6. Step 6: Final answer
    x = 6,490.21

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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.