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Finding the Third Proportional to 5,421 and 8,734.50

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Solution

The third proportional to 5,421 and 8,734.50 is: 14,073.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421 : 8,734.50 = 8,734.50 : x
  2. Step 2: Convert to fraction form
    5,421/8,734.50 = 8,734.50/x
  3. Step 3: Cross multiply
    5,421x = 8,734.50 × 8,734.50
  4. Step 4: Simplify right side
    5,421x = 76,291,490.25
  5. Step 5: Solve for x
    x = 76,291,490.25/5,421
  6. Step 6: Final answer
    x = 14,073.32

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.