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Finding the Third Proportional to 4,428 and 9,729.28

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Solution

The third proportional to 4,428 and 9,729.28 is: 21,377.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,428 : 9,729.28 = 9,729.28 : x
  2. Step 2: Convert to fraction form
    4,428/9,729.28 = 9,729.28/x
  3. Step 3: Cross multiply
    4,428x = 9,729.28 × 9,729.28
  4. Step 4: Simplify right side
    4,428x = 94,658,913.64
  5. Step 5: Solve for x
    x = 94,658,913.64/4,428
  6. Step 6: Final answer
    x = 21,377.35

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.