Home / 20,960.14-28,936.94-13,896.12

Finding the Fourth Proportional to 20,960.14, 28,936.94 and 13,896.12

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Solution

The fourth proportional to 20,960.14, 28,936.94 and 13,896.12 is: 19,184.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.14 : 28,936.94 = 13,896.12 : x
  2. Step 2: Convert to fraction form
    20,960.14/28,936.94 = 13,896.12/x
  3. Step 3: Cross multiply
    20,960.14x = 28,936.94 × 13,896.12
  4. Step 4: Simplify right side
    20,960.14x = 402,111,190.67
  5. Step 5: Solve for x
    x = 402,111,190.67/20,960.14
  6. Step 6: Final answer
    x = 19,184.57

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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.