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Finding the Fourth Proportional to 21,323, 29,425.10 and 12,369.90

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Solution

The fourth proportional to 21,323, 29,425.10 and 12,369.90 is: 17,070.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,323 : 29,425.10 = 12,369.90 : x
  2. Step 2: Convert to fraction form
    21,323/29,425.10 = 12,369.90/x
  3. Step 3: Cross multiply
    21,323x = 29,425.10 × 12,369.90
  4. Step 4: Simplify right side
    21,323x = 363,985,544.49
  5. Step 5: Solve for x
    x = 363,985,544.49/21,323
  6. Step 6: Final answer
    x = 17,070.09

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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.