Home / 20,720.43-28,592.04-11,644.35

Finding the Fourth Proportional to 20,720.43, 28,592.04 and 11,644.35

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Solution

The fourth proportional to 20,720.43, 28,592.04 and 11,644.35 is: 16,067.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.43 : 28,592.04 = 11,644.35 : x
  2. Step 2: Convert to fraction form
    20,720.43/28,592.04 = 11,644.35/x
  3. Step 3: Cross multiply
    20,720.43x = 28,592.04 × 11,644.35
  4. Step 4: Simplify right side
    20,720.43x = 332,935,720.97
  5. Step 5: Solve for x
    x = 332,935,720.97/20,720.43
  6. Step 6: Final answer
    x = 16,067.99

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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.