Home / 28,229.81-38,958.89-15,654.56

Finding the Fourth Proportional to 28,229.81, 38,958.89 and 15,654.56

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Solution

The fourth proportional to 28,229.81, 38,958.89 and 15,654.56 is: 21,604.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.81 : 38,958.89 = 15,654.56 : x
  2. Step 2: Convert to fraction form
    28,229.81/38,958.89 = 15,654.56/x
  3. Step 3: Cross multiply
    28,229.81x = 38,958.89 × 15,654.56
  4. Step 4: Simplify right side
    28,229.81x = 609,884,007.97
  5. Step 5: Solve for x
    x = 609,884,007.97/28,229.81
  6. Step 6: Final answer
    x = 21,604.26

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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.