Home / 20,999.93-28,979.89-11,568.49

Finding the Fourth Proportional to 20,999.93, 28,979.89 and 11,568.49

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Solution

The fourth proportional to 20,999.93, 28,979.89 and 11,568.49 is: 15,964.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.93 : 28,979.89 = 11,568.49 : x
  2. Step 2: Convert to fraction form
    20,999.93/28,979.89 = 11,568.49/x
  3. Step 3: Cross multiply
    20,999.93x = 28,979.89 × 11,568.49
  4. Step 4: Simplify right side
    20,999.93x = 335,253,567.67
  5. Step 5: Solve for x
    x = 335,253,567.67/20,999.93
  6. Step 6: Final answer
    x = 15,964.51

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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.