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Finding the Fourth Proportional to 21,894.29, 30,211.93 and 12,333.91

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Solution

The fourth proportional to 21,894.29, 30,211.93 and 12,333.91 is: 17,019.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.29 : 30,211.93 = 12,333.91 : x
  2. Step 2: Convert to fraction form
    21,894.29/30,211.93 = 12,333.91/x
  3. Step 3: Cross multiply
    21,894.29x = 30,211.93 × 12,333.91
  4. Step 4: Simplify right side
    21,894.29x = 372,631,225.55
  5. Step 5: Solve for x
    x = 372,631,225.55/21,894.29
  6. Step 6: Final answer
    x = 17,019.56

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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.