Home / 11,801.21-16,290.77-8,438.18

Finding the Fourth Proportional to 11,801.21, 16,290.77 and 8,438.18

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Solution

The fourth proportional to 11,801.21, 16,290.77 and 8,438.18 is: 11,648.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,801.21 : 16,290.77 = 8,438.18 : x
  2. Step 2: Convert to fraction form
    11,801.21/16,290.77 = 8,438.18/x
  3. Step 3: Cross multiply
    11,801.21x = 16,290.77 × 8,438.18
  4. Step 4: Simplify right side
    11,801.21x = 137,464,325.95
  5. Step 5: Solve for x
    x = 137,464,325.95/11,801.21
  6. Step 6: Final answer
    x = 11,648.33

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Half scale
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Double scale
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Similar ratio
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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.