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Finding the Third Proportional to 21,254.91 and 30,378.80

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Solution

The third proportional to 21,254.91 and 30,378.80 is: 43,419.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.91 : 30,378.80 = 30,378.80 : x
  2. Step 2: Convert to fraction form
    21,254.91/30,378.80 = 30,378.80/x
  3. Step 3: Cross multiply
    21,254.91x = 30,378.80 × 30,378.80
  4. Step 4: Simplify right side
    21,254.91x = 922,871,299.57
  5. Step 5: Solve for x
    x = 922,871,299.57/21,254.91
  6. Step 6: Final answer
    x = 43,419.21

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.