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Finding the Fourth Proportional to 28,477.60, 42,722.80 and 16,784.80

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Solution

The fourth proportional to 28,477.60, 42,722.80 and 16,784.80 is: 25,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,477.60 : 42,722.80 = 16,784.80 : x
  2. Step 2: Convert to fraction form
    28,477.60/42,722.80 = 16,784.80/x
  3. Step 3: Cross multiply
    28,477.60x = 42,722.80 × 16,784.80
  4. Step 4: Simplify right side
    28,477.60x = 717,093,653.44
  5. Step 5: Solve for x
    x = 717,093,653.44/28,477.60
  6. Step 6: Final answer
    x = 25,180.97

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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.