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Finding the Third Proportional to 8,784 and 15,120

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Solution

The third proportional to 8,784 and 15,120 is: 26,026.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784 : 15,120 = 15,120 : x
  2. Step 2: Convert to fraction form
    8,784/15,120 = 15,120/x
  3. Step 3: Cross multiply
    8,784x = 15,120 × 15,120
  4. Step 4: Simplify right side
    8,784x = 228,614,400
  5. Step 5: Solve for x
    x = 228,614,400/8,784
  6. Step 6: Final answer
    x = 26,026.23

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.