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Finding the Fourth Proportional to 21,681.67, 29,921.29 and 12,250.03

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Solution

The fourth proportional to 21,681.67, 29,921.29 and 12,250.03 is: 16,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.67 : 29,921.29 = 12,250.03 : x
  2. Step 2: Convert to fraction form
    21,681.67/29,921.29 = 12,250.03/x
  3. Step 3: Cross multiply
    21,681.67x = 29,921.29 × 12,250.03
  4. Step 4: Simplify right side
    21,681.67x = 366,536,700.14
  5. Step 5: Solve for x
    x = 366,536,700.14/21,681.67
  6. Step 6: Final answer
    x = 16,905.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.