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Finding the Fourth Proportional to 7,780.54, 10,736.82 and 4,243.54

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Solution

The fourth proportional to 7,780.54, 10,736.82 and 4,243.54 is: 5,855.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.54 : 10,736.82 = 4,243.54 : x
  2. Step 2: Convert to fraction form
    7,780.54/10,736.82 = 4,243.54/x
  3. Step 3: Cross multiply
    7,780.54x = 10,736.82 × 4,243.54
  4. Step 4: Simplify right side
    7,780.54x = 45,562,125.14
  5. Step 5: Solve for x
    x = 45,562,125.14/7,780.54
  6. Step 6: Final answer
    x = 5,855.91

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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.