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Finding the Third Proportional to 7,200 and 15,408

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Solution

The third proportional to 7,200 and 15,408 is: 32,973.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200 : 15,408 = 15,408 : x
  2. Step 2: Convert to fraction form
    7,200/15,408 = 15,408/x
  3. Step 3: Cross multiply
    7,200x = 15,408 × 15,408
  4. Step 4: Simplify right side
    7,200x = 237,406,464
  5. Step 5: Solve for x
    x = 237,406,464/7,200
  6. Step 6: Final answer
    x = 32,973.12

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.