Home / 20,935.82-28,890.65-11,983.09

Finding the Fourth Proportional to 20,935.82, 28,890.65 and 11,983.09

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Solution

The fourth proportional to 20,935.82, 28,890.65 and 11,983.09 is: 16,536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.82 : 28,890.65 = 11,983.09 : x
  2. Step 2: Convert to fraction form
    20,935.82/28,890.65 = 11,983.09/x
  3. Step 3: Cross multiply
    20,935.82x = 28,890.65 × 11,983.09
  4. Step 4: Simplify right side
    20,935.82x = 346,199,237.31
  5. Step 5: Solve for x
    x = 346,199,237.31/20,935.82
  6. Step 6: Final answer
    x = 16,536.22

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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.