Home / 20,902.21-28,843.90-11,470.03

Finding the Fourth Proportional to 20,902.21, 28,843.90 and 11,470.03

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Solution

The fourth proportional to 20,902.21, 28,843.90 and 11,470.03 is: 15,828.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.21 : 28,843.90 = 11,470.03 : x
  2. Step 2: Convert to fraction form
    20,902.21/28,843.90 = 11,470.03/x
  3. Step 3: Cross multiply
    20,902.21x = 28,843.90 × 11,470.03
  4. Step 4: Simplify right side
    20,902.21x = 330,840,398.32
  5. Step 5: Solve for x
    x = 330,840,398.32/20,902.21
  6. Step 6: Final answer
    x = 15,828.01

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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.