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Finding the Third Proportional to 9,879 and 14,428

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Solution

The third proportional to 9,879 and 14,428 is: 21,071.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879 : 14,428 = 14,428 : x
  2. Step 2: Convert to fraction form
    9,879/14,428 = 14,428/x
  3. Step 3: Cross multiply
    9,879x = 14,428 × 14,428
  4. Step 4: Simplify right side
    9,879x = 208,167,184
  5. Step 5: Solve for x
    x = 208,167,184/9,879
  6. Step 6: Final answer
    x = 21,071.69

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.