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Finding the Third Proportional to 9,681 and 20,971.50

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Solution

The third proportional to 9,681 and 20,971.50 is: 45,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,681 : 20,971.50 = 20,971.50 : x
  2. Step 2: Convert to fraction form
    9,681/20,971.50 = 20,971.50/x
  3. Step 3: Cross multiply
    9,681x = 20,971.50 × 20,971.50
  4. Step 4: Simplify right side
    9,681x = 439,803,812.25
  5. Step 5: Solve for x
    x = 439,803,812.25/9,681
  6. Step 6: Final answer
    x = 45,429.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.