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Finding the Fourth Proportional to 7,040.48, 9,715.46 and 3,896.48

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Solution

The fourth proportional to 7,040.48, 9,715.46 and 3,896.48 is: 5,376.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.48 : 9,715.46 = 3,896.48 : x
  2. Step 2: Convert to fraction form
    7,040.48/9,715.46 = 3,896.48/x
  3. Step 3: Cross multiply
    7,040.48x = 9,715.46 × 3,896.48
  4. Step 4: Simplify right side
    7,040.48x = 37,856,095.58
  5. Step 5: Solve for x
    x = 37,856,095.58/7,040.48
  6. Step 6: Final answer
    x = 5,376.92

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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.