Home / 20,403.22-28,156.74-11,450.20

Finding the Fourth Proportional to 20,403.22, 28,156.74 and 11,450.20

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Solution

The fourth proportional to 20,403.22, 28,156.74 and 11,450.20 is: 15,801.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.22 : 28,156.74 = 11,450.20 : x
  2. Step 2: Convert to fraction form
    20,403.22/28,156.74 = 11,450.20/x
  3. Step 3: Cross multiply
    20,403.22x = 28,156.74 × 11,450.20
  4. Step 4: Simplify right side
    20,403.22x = 322,400,304.35
  5. Step 5: Solve for x
    x = 322,400,304.35/20,403.22
  6. Step 6: Final answer
    x = 15,801.44

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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.