Home / 20,932.89-28,886.88-11,979.81

Finding the Fourth Proportional to 20,932.89, 28,886.88 and 11,979.81

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Solution

The fourth proportional to 20,932.89, 28,886.88 and 11,979.81 is: 16,531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.89 : 28,886.88 = 11,979.81 : x
  2. Step 2: Convert to fraction form
    20,932.89/28,886.88 = 11,979.81/x
  3. Step 3: Cross multiply
    20,932.89x = 28,886.88 × 11,979.81
  4. Step 4: Simplify right side
    20,932.89x = 346,059,333.89
  5. Step 5: Solve for x
    x = 346,059,333.89/20,932.89
  6. Step 6: Final answer
    x = 16,531.85

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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.