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Finding the Fourth Proportional to 28,883.25, 39,858.89 and 15,635.25

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Solution

The fourth proportional to 28,883.25, 39,858.89 and 15,635.25 is: 21,576.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,883.25 : 39,858.89 = 15,635.25 : x
  2. Step 2: Convert to fraction form
    28,883.25/39,858.89 = 15,635.25/x
  3. Step 3: Cross multiply
    28,883.25x = 39,858.89 × 15,635.25
  4. Step 4: Simplify right side
    28,883.25x = 623,203,631.70
  5. Step 5: Solve for x
    x = 623,203,631.70/28,883.25
  6. Step 6: Final answer
    x = 21,576.65

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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.