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Finding the Third Proportional to 7,040 and 15,120

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Solution

The third proportional to 7,040 and 15,120 is: 32,473.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040 : 15,120 = 15,120 : x
  2. Step 2: Convert to fraction form
    7,040/15,120 = 15,120/x
  3. Step 3: Cross multiply
    7,040x = 15,120 × 15,120
  4. Step 4: Simplify right side
    7,040x = 228,614,400
  5. Step 5: Solve for x
    x = 228,614,400/7,040
  6. Step 6: Final answer
    x = 32,473.64

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.