Home / 20,857.76-28,780.88-12,794.96

Finding the Fourth Proportional to 20,857.76, 28,780.88 and 12,794.96

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Solution

The fourth proportional to 20,857.76, 28,780.88 and 12,794.96 is: 17,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.76 : 28,780.88 = 12,794.96 : x
  2. Step 2: Convert to fraction form
    20,857.76/28,780.88 = 12,794.96/x
  3. Step 3: Cross multiply
    20,857.76x = 28,780.88 × 12,794.96
  4. Step 4: Simplify right side
    20,857.76x = 368,250,208.36
  5. Step 5: Solve for x
    x = 368,250,208.36/20,857.76
  6. Step 6: Final answer
    x = 17,655.31

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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.