Home / 20,427.99-28,191.36-11,475.30

Finding the Fourth Proportional to 20,427.99, 28,191.36 and 11,475.30

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Solution

The fourth proportional to 20,427.99, 28,191.36 and 11,475.30 is: 15,836.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.99 : 28,191.36 = 11,475.30 : x
  2. Step 2: Convert to fraction form
    20,427.99/28,191.36 = 11,475.30/x
  3. Step 3: Cross multiply
    20,427.99x = 28,191.36 × 11,475.30
  4. Step 4: Simplify right side
    20,427.99x = 323,504,313.41
  5. Step 5: Solve for x
    x = 323,504,313.41/20,427.99
  6. Step 6: Final answer
    x = 15,836.33

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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.