Home / 11,938.63-16,458.20-8,390.83

Finding the Fourth Proportional to 11,938.63, 16,458.20 and 8,390.83

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Solution

The fourth proportional to 11,938.63, 16,458.20 and 8,390.83 is: 11,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,938.63 : 16,458.20 = 8,390.83 : x
  2. Step 2: Convert to fraction form
    11,938.63/16,458.20 = 8,390.83/x
  3. Step 3: Cross multiply
    11,938.63x = 16,458.20 × 8,390.83
  4. Step 4: Simplify right side
    11,938.63x = 138,097,906.67
  5. Step 5: Solve for x
    x = 138,097,906.67/11,938.63
  6. Step 6: Final answer
    x = 11,567.32

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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.