Home / 20,187.36-27,872.40-12,636.96

Finding the Fourth Proportional to 20,187.36, 27,872.40 and 12,636.96

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Solution

The fourth proportional to 20,187.36, 27,872.40 and 12,636.96 is: 17,447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.36 : 27,872.40 = 12,636.96 : x
  2. Step 2: Convert to fraction form
    20,187.36/27,872.40 = 12,636.96/x
  3. Step 3: Cross multiply
    20,187.36x = 27,872.40 × 12,636.96
  4. Step 4: Simplify right side
    20,187.36x = 352,222,403.90
  5. Step 5: Solve for x
    x = 352,222,403.90/20,187.36
  6. Step 6: Final answer
    x = 17,447.67

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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.