Home / 20,957.94-28,936.77-13,899.06

Finding the Fourth Proportional to 20,957.94, 28,936.77 and 13,899.06

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Solution

The fourth proportional to 20,957.94, 28,936.77 and 13,899.06 is: 19,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.94 : 28,936.77 = 13,899.06 : x
  2. Step 2: Convert to fraction form
    20,957.94/28,936.77 = 13,899.06/x
  3. Step 3: Cross multiply
    20,957.94x = 28,936.77 × 13,899.06
  4. Step 4: Simplify right side
    20,957.94x = 402,193,902.44
  5. Step 5: Solve for x
    x = 402,193,902.44/20,957.94
  6. Step 6: Final answer
    x = 19,190.53

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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.