Home / 20,857.96-28,783.65-11,905.23

Finding the Fourth Proportional to 20,857.96, 28,783.65 and 11,905.23

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Solution

The fourth proportional to 20,857.96, 28,783.65 and 11,905.23 is: 16,429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.96 : 28,783.65 = 11,905.23 : x
  2. Step 2: Convert to fraction form
    20,857.96/28,783.65 = 11,905.23/x
  3. Step 3: Cross multiply
    20,857.96x = 28,783.65 × 11,905.23
  4. Step 4: Simplify right side
    20,857.96x = 342,675,973.49
  5. Step 5: Solve for x
    x = 342,675,973.49/20,857.96
  6. Step 6: Final answer
    x = 16,429.03

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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.