Home / 20,888.12-28,822.93-11,936.20

Finding the Fourth Proportional to 20,888.12, 28,822.93 and 11,936.20

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Solution

The fourth proportional to 20,888.12, 28,822.93 and 11,936.20 is: 16,470.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.12 : 28,822.93 = 11,936.20 : x
  2. Step 2: Convert to fraction form
    20,888.12/28,822.93 = 11,936.20/x
  3. Step 3: Cross multiply
    20,888.12x = 28,822.93 × 11,936.20
  4. Step 4: Simplify right side
    20,888.12x = 344,036,257.07
  5. Step 5: Solve for x
    x = 344,036,257.07/20,888.12
  6. Step 6: Final answer
    x = 16,470.43

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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.