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Finding the Fourth Proportional to 6,557.78, 9,049.77 and 3,905.30

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Solution

The fourth proportional to 6,557.78, 9,049.77 and 3,905.30 is: 5,389.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,557.78 : 9,049.77 = 3,905.30 : x
  2. Step 2: Convert to fraction form
    6,557.78/9,049.77 = 3,905.30/x
  3. Step 3: Cross multiply
    6,557.78x = 9,049.77 × 3,905.30
  4. Step 4: Simplify right side
    6,557.78x = 35,342,021.53
  5. Step 5: Solve for x
    x = 35,342,021.53/6,557.78
  6. Step 6: Final answer
    x = 5,389.33

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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.