Home / 20,638.39-30,957.59-8,317.75

Finding the Fourth Proportional to 20,638.39, 30,957.59 and 8,317.75

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Solution

The fourth proportional to 20,638.39, 30,957.59 and 8,317.75 is: 12,476.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.39 : 30,957.59 = 8,317.75 : x
  2. Step 2: Convert to fraction form
    20,638.39/30,957.59 = 8,317.75/x
  3. Step 3: Cross multiply
    20,638.39x = 30,957.59 × 8,317.75
  4. Step 4: Simplify right side
    20,638.39x = 257,497,494.22
  5. Step 5: Solve for x
    x = 257,497,494.22/20,638.39
  6. Step 6: Final answer
    x = 12,476.63

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.