Home / 20,471.81-28,250.96-11,519.38

Finding the Fourth Proportional to 20,471.81, 28,250.96 and 11,519.38

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Solution

The fourth proportional to 20,471.81, 28,250.96 and 11,519.38 is: 15,896.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.81 : 28,250.96 = 11,519.38 : x
  2. Step 2: Convert to fraction form
    20,471.81/28,250.96 = 11,519.38/x
  3. Step 3: Cross multiply
    20,471.81x = 28,250.96 × 11,519.38
  4. Step 4: Simplify right side
    20,471.81x = 325,433,521.32
  5. Step 5: Solve for x
    x = 325,433,521.32/20,471.81
  6. Step 6: Final answer
    x = 15,896.67

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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.