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Finding the Fourth Proportional to 28,533.89, 39,375.89 and 15,786.32

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Solution

The fourth proportional to 28,533.89, 39,375.89 and 15,786.32 is: 21,784.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,533.89 : 39,375.89 = 15,786.32 : x
  2. Step 2: Convert to fraction form
    28,533.89/39,375.89 = 15,786.32/x
  3. Step 3: Cross multiply
    28,533.89x = 39,375.89 × 15,786.32
  4. Step 4: Simplify right side
    28,533.89x = 621,600,124.01
  5. Step 5: Solve for x
    x = 621,600,124.01/28,533.89
  6. Step 6: Final answer
    x = 21,784.62

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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.