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Finding the Fourth Proportional to 28,896.52, 39,880.86 and 16,321

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Solution

The fourth proportional to 28,896.52, 39,880.86 and 16,321 is: 22,525.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,896.52 : 39,880.86 = 16,321 : x
  2. Step 2: Convert to fraction form
    28,896.52/39,880.86 = 16,321/x
  3. Step 3: Cross multiply
    28,896.52x = 39,880.86 × 16,321
  4. Step 4: Simplify right side
    28,896.52x = 650,895,516.06
  5. Step 5: Solve for x
    x = 650,895,516.06/28,896.52
  6. Step 6: Final answer
    x = 22,525.05

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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.