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Finding the Fourth Proportional to 28,940.80, 39,945.60 and 16,369.60

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Solution

The fourth proportional to 28,940.80, 39,945.60 and 16,369.60 is: 22,594.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,940.80 : 39,945.60 = 16,369.60 : x
  2. Step 2: Convert to fraction form
    28,940.80/39,945.60 = 16,369.60/x
  3. Step 3: Cross multiply
    28,940.80x = 39,945.60 × 16,369.60
  4. Step 4: Simplify right side
    28,940.80x = 653,893,493.76
  5. Step 5: Solve for x
    x = 653,893,493.76/28,940.80
  6. Step 6: Final answer
    x = 22,594.17

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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.