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Finding the Third Proportional to 7,155 and 7,875

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Solution

The third proportional to 7,155 and 7,875 is: 8,667.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155 : 7,875 = 7,875 : x
  2. Step 2: Convert to fraction form
    7,155/7,875 = 7,875/x
  3. Step 3: Cross multiply
    7,155x = 7,875 × 7,875
  4. Step 4: Simplify right side
    7,155x = 62,015,625
  5. Step 5: Solve for x
    x = 62,015,625/7,155
  6. Step 6: Final answer
    x = 8,667.45

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These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.