Home / 20,428.88-28,194.46-12,469.40

Finding the Fourth Proportional to 20,428.88, 28,194.46 and 12,469.40

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Solution

The fourth proportional to 20,428.88, 28,194.46 and 12,469.40 is: 17,209.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.88 : 28,194.46 = 12,469.40 : x
  2. Step 2: Convert to fraction form
    20,428.88/28,194.46 = 12,469.40/x
  3. Step 3: Cross multiply
    20,428.88x = 28,194.46 × 12,469.40
  4. Step 4: Simplify right side
    20,428.88x = 351,567,999.52
  5. Step 5: Solve for x
    x = 351,567,999.52/20,428.88
  6. Step 6: Final answer
    x = 17,209.36

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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.