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Finding the Fourth Proportional to 21,051.84, 29,050.32 and 11,619.84

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Solution

The fourth proportional to 21,051.84, 29,050.32 and 11,619.84 is: 16,034.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.84 : 29,050.32 = 11,619.84 : x
  2. Step 2: Convert to fraction form
    21,051.84/29,050.32 = 11,619.84/x
  3. Step 3: Cross multiply
    21,051.84x = 29,050.32 × 11,619.84
  4. Step 4: Simplify right side
    21,051.84x = 337,560,070.35
  5. Step 5: Solve for x
    x = 337,560,070.35/21,051.84
  6. Step 6: Final answer
    x = 16,034.71

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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.