Home / 20,427.89-28,187.42-11,473.67

Finding the Fourth Proportional to 20,427.89, 28,187.42 and 11,473.67

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Solution

The fourth proportional to 20,427.89, 28,187.42 and 11,473.67 is: 15,831.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.89 : 28,187.42 = 11,473.67 : x
  2. Step 2: Convert to fraction form
    20,427.89/28,187.42 = 11,473.67/x
  3. Step 3: Cross multiply
    20,427.89x = 28,187.42 × 11,473.67
  4. Step 4: Simplify right side
    20,427.89x = 323,413,168.33
  5. Step 5: Solve for x
    x = 323,413,168.33/20,427.89
  6. Step 6: Final answer
    x = 15,831.95

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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.