Home / 13,078.76-18,040.68-12,203.96

Finding the Fourth Proportional to 13,078.76, 18,040.68 and 12,203.96

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Solution

The fourth proportional to 13,078.76, 18,040.68 and 12,203.96 is: 16,833.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.76 : 18,040.68 = 12,203.96 : x
  2. Step 2: Convert to fraction form
    13,078.76/18,040.68 = 12,203.96/x
  3. Step 3: Cross multiply
    13,078.76x = 18,040.68 × 12,203.96
  4. Step 4: Simplify right side
    13,078.76x = 220,167,737.09
  5. Step 5: Solve for x
    x = 220,167,737.09/13,078.76
  6. Step 6: Final answer
    x = 16,833.99

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Half scale
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Double scale
Find fourth proportional to 13,079.76, 18,042.06 and 12,204.96
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.