Home / 20,645.61-28,481.81-12,257.25

Finding the Fourth Proportional to 20,645.61, 28,481.81 and 12,257.25

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Solution

The fourth proportional to 20,645.61, 28,481.81 and 12,257.25 is: 16,909.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.61 : 28,481.81 = 12,257.25 : x
  2. Step 2: Convert to fraction form
    20,645.61/28,481.81 = 12,257.25/x
  3. Step 3: Cross multiply
    20,645.61x = 28,481.81 × 12,257.25
  4. Step 4: Simplify right side
    20,645.61x = 349,108,604.34
  5. Step 5: Solve for x
    x = 349,108,604.34/20,645.61
  6. Step 6: Final answer
    x = 16,909.58

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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.