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Finding the Third Proportional to 5,143 and 7,854

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Solution

The third proportional to 5,143 and 7,854 is: 11,994.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143 : 7,854 = 7,854 : x
  2. Step 2: Convert to fraction form
    5,143/7,854 = 7,854/x
  3. Step 3: Cross multiply
    5,143x = 7,854 × 7,854
  4. Step 4: Simplify right side
    5,143x = 61,685,316
  5. Step 5: Solve for x
    x = 61,685,316/5,143
  6. Step 6: Final answer
    x = 11,994.03

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.