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Finding the Fourth Proportional to 15,171.96, 20,938.92 and 8,889.60

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Solution

The fourth proportional to 15,171.96, 20,938.92 and 8,889.60 is: 12,268.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.96 : 20,938.92 = 8,889.60 : x
  2. Step 2: Convert to fraction form
    15,171.96/20,938.92 = 8,889.60/x
  3. Step 3: Cross multiply
    15,171.96x = 20,938.92 × 8,889.60
  4. Step 4: Simplify right side
    15,171.96x = 186,138,623.23
  5. Step 5: Solve for x
    x = 186,138,623.23/15,171.96
  6. Step 6: Final answer
    x = 12,268.59

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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.