Home / 20,394.29-28,144.11-11,902.25

Finding the Fourth Proportional to 20,394.29, 28,144.11 and 11,902.25

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Solution

The fourth proportional to 20,394.29, 28,144.11 and 11,902.25 is: 16,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.29 : 28,144.11 = 11,902.25 : x
  2. Step 2: Convert to fraction form
    20,394.29/28,144.11 = 11,902.25/x
  3. Step 3: Cross multiply
    20,394.29x = 28,144.11 × 11,902.25
  4. Step 4: Simplify right side
    20,394.29x = 334,978,303.61
  5. Step 5: Solve for x
    x = 334,978,303.61/20,394.29
  6. Step 6: Final answer
    x = 16,425.10

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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.