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Finding the Fourth Proportional to 7,178.26, 9,905.86 and 4,383.76

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Solution

The fourth proportional to 7,178.26, 9,905.86 and 4,383.76 is: 6,049.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,178.26 : 9,905.86 = 4,383.76 : x
  2. Step 2: Convert to fraction form
    7,178.26/9,905.86 = 4,383.76/x
  3. Step 3: Cross multiply
    7,178.26x = 9,905.86 × 4,383.76
  4. Step 4: Simplify right side
    7,178.26x = 43,424,912.83
  5. Step 5: Solve for x
    x = 43,424,912.83/7,178.26
  6. Step 6: Final answer
    x = 6,049.50

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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.