Home / 20,394.22-28,152.66-12,439.30

Finding the Fourth Proportional to 20,394.22, 28,152.66 and 12,439.30

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Solution

The fourth proportional to 20,394.22, 28,152.66 and 12,439.30 is: 17,171.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.22 : 28,152.66 = 12,439.30 : x
  2. Step 2: Convert to fraction form
    20,394.22/28,152.66 = 12,439.30/x
  3. Step 3: Cross multiply
    20,394.22x = 28,152.66 × 12,439.30
  4. Step 4: Simplify right side
    20,394.22x = 350,199,383.54
  5. Step 5: Solve for x
    x = 350,199,383.54/20,394.22
  6. Step 6: Final answer
    x = 17,171.50

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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.