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Finding the Fourth Proportional to 28,994.72, 43,485.60 and 14,188.80

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Solution

The fourth proportional to 28,994.72, 43,485.60 and 14,188.80 is: 21,280.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,994.72 : 43,485.60 = 14,188.80 : x
  2. Step 2: Convert to fraction form
    28,994.72/43,485.60 = 14,188.80/x
  3. Step 3: Cross multiply
    28,994.72x = 43,485.60 × 14,188.80
  4. Step 4: Simplify right side
    28,994.72x = 617,008,481.28
  5. Step 5: Solve for x
    x = 617,008,481.28/28,994.72
  6. Step 6: Final answer
    x = 21,280.03

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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.