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Finding the Fourth Proportional to 28,959.84, 43,440.18 and 11,429.50

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Solution

The fourth proportional to 28,959.84, 43,440.18 and 11,429.50 is: 17,144.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.84 : 43,440.18 = 11,429.50 : x
  2. Step 2: Convert to fraction form
    28,959.84/43,440.18 = 11,429.50/x
  3. Step 3: Cross multiply
    28,959.84x = 43,440.18 × 11,429.50
  4. Step 4: Simplify right side
    28,959.84x = 496,499,537.31
  5. Step 5: Solve for x
    x = 496,499,537.31/28,959.84
  6. Step 6: Final answer
    x = 17,144.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.