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Finding the Fourth Proportional to 28,132.88, 42,205.01 and 12,550.50

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Solution

The fourth proportional to 28,132.88, 42,205.01 and 12,550.50 is: 18,828.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,132.88 : 42,205.01 = 12,550.50 : x
  2. Step 2: Convert to fraction form
    28,132.88/42,205.01 = 12,550.50/x
  3. Step 3: Cross multiply
    28,132.88x = 42,205.01 × 12,550.50
  4. Step 4: Simplify right side
    28,132.88x = 529,693,915.25
  5. Step 5: Solve for x
    x = 529,693,915.25/28,132.88
  6. Step 6: Final answer
    x = 18,828.29

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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.