Home / 20,853.54-28,778.45-11,778.18

Finding the Fourth Proportional to 20,853.54, 28,778.45 and 11,778.18

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Solution

The fourth proportional to 20,853.54, 28,778.45 and 11,778.18 is: 16,254.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.54 : 28,778.45 = 11,778.18 : x
  2. Step 2: Convert to fraction form
    20,853.54/28,778.45 = 11,778.18/x
  3. Step 3: Cross multiply
    20,853.54x = 28,778.45 × 11,778.18
  4. Step 4: Simplify right side
    20,853.54x = 338,957,764.22
  5. Step 5: Solve for x
    x = 338,957,764.22/20,853.54
  6. Step 6: Final answer
    x = 16,254.21

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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.