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Finding the Fourth Proportional to 28,788.50, 39,728.25 and 16,213.46

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Solution

The fourth proportional to 28,788.50, 39,728.25 and 16,213.46 is: 22,374.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,788.50 : 39,728.25 = 16,213.46 : x
  2. Step 2: Convert to fraction form
    28,788.50/39,728.25 = 16,213.46/x
  3. Step 3: Cross multiply
    28,788.50x = 39,728.25 × 16,213.46
  4. Step 4: Simplify right side
    28,788.50x = 644,132,392.25
  5. Step 5: Solve for x
    x = 644,132,392.25/28,788.50
  6. Step 6: Final answer
    x = 22,374.64

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1.5x scale

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.