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Finding the Fourth Proportional to 28,511.89, 42,772.97 and 9,787.09

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Solution

The fourth proportional to 28,511.89, 42,772.97 and 9,787.09 is: 14,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.89 : 42,772.97 = 9,787.09 : x
  2. Step 2: Convert to fraction form
    28,511.89/42,772.97 = 9,787.09/x
  3. Step 3: Cross multiply
    28,511.89x = 42,772.97 × 9,787.09
  4. Step 4: Simplify right side
    28,511.89x = 418,622,906.96
  5. Step 5: Solve for x
    x = 418,622,906.96/28,511.89
  6. Step 6: Final answer
    x = 14,682.40

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1.5x scale

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.