Home / 20,810.38-28,716.34-11,857.66

Finding the Fourth Proportional to 20,810.38, 28,716.34 and 11,857.66

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Solution

The fourth proportional to 20,810.38, 28,716.34 and 11,857.66 is: 16,362.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.38 : 28,716.34 = 11,857.66 : x
  2. Step 2: Convert to fraction form
    20,810.38/28,716.34 = 11,857.66/x
  3. Step 3: Cross multiply
    20,810.38x = 28,716.34 × 11,857.66
  4. Step 4: Simplify right side
    20,810.38x = 340,508,596.16
  5. Step 5: Solve for x
    x = 340,508,596.16/20,810.38
  6. Step 6: Final answer
    x = 16,362.44

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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.