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Finding the Third Proportional to 6,420 and 7,476

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Solution

The third proportional to 6,420 and 7,476 is: 8,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420 : 7,476 = 7,476 : x
  2. Step 2: Convert to fraction form
    6,420/7,476 = 7,476/x
  3. Step 3: Cross multiply
    6,420x = 7,476 × 7,476
  4. Step 4: Simplify right side
    6,420x = 55,890,576
  5. Step 5: Solve for x
    x = 55,890,576/6,420
  6. Step 6: Final answer
    x = 8,705.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.