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Finding the Third Proportional to 5,315 and 7,570

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Solution

The third proportional to 5,315 and 7,570 is: 10,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315 : 7,570 = 7,570 : x
  2. Step 2: Convert to fraction form
    5,315/7,570 = 7,570/x
  3. Step 3: Cross multiply
    5,315x = 7,570 × 7,570
  4. Step 4: Simplify right side
    5,315x = 57,304,900
  5. Step 5: Solve for x
    x = 57,304,900/5,315
  6. Step 6: Final answer
    x = 10,781.73

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.