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Finding the Fourth Proportional to 28,662.90, 39,552.54 and 15,914.88

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Solution

The fourth proportional to 28,662.90, 39,552.54 and 15,914.88 is: 21,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.90 : 39,552.54 = 15,914.88 : x
  2. Step 2: Convert to fraction form
    28,662.90/39,552.54 = 15,914.88/x
  3. Step 3: Cross multiply
    28,662.90x = 39,552.54 × 15,914.88
  4. Step 4: Simplify right side
    28,662.90x = 629,473,927.80
  5. Step 5: Solve for x
    x = 629,473,927.80/28,662.90
  6. Step 6: Final answer
    x = 21,961.28

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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.