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Finding the Third Proportional to 9,000 and 19,740

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Solution

The third proportional to 9,000 and 19,740 is: 43,296.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000 : 19,740 = 19,740 : x
  2. Step 2: Convert to fraction form
    9,000/19,740 = 19,740/x
  3. Step 3: Cross multiply
    9,000x = 19,740 × 19,740
  4. Step 4: Simplify right side
    9,000x = 389,667,600
  5. Step 5: Solve for x
    x = 389,667,600/9,000
  6. Step 6: Final answer
    x = 43,296.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.