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Finding the Third Proportional to 4,056 and 7,140

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Solution

The third proportional to 4,056 and 7,140 is: 12,568.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,056 : 7,140 = 7,140 : x
  2. Step 2: Convert to fraction form
    4,056/7,140 = 7,140/x
  3. Step 3: Cross multiply
    4,056x = 7,140 × 7,140
  4. Step 4: Simplify right side
    4,056x = 50,979,600
  5. Step 5: Solve for x
    x = 50,979,600/4,056
  6. Step 6: Final answer
    x = 12,568.93

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.