Home / 20,618.70-28,453.68-11,187.24

Finding the Fourth Proportional to 20,618.70, 28,453.68 and 11,187.24

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Solution

The fourth proportional to 20,618.70, 28,453.68 and 11,187.24 is: 15,438.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.70 : 28,453.68 = 11,187.24 : x
  2. Step 2: Convert to fraction form
    20,618.70/28,453.68 = 11,187.24/x
  3. Step 3: Cross multiply
    20,618.70x = 28,453.68 × 11,187.24
  4. Step 4: Simplify right side
    20,618.70x = 318,318,147.04
  5. Step 5: Solve for x
    x = 318,318,147.04/20,618.70
  6. Step 6: Final answer
    x = 15,438.32

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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.