Home / 20,631.24-28,471.08-11,199.80

Finding the Fourth Proportional to 20,631.24, 28,471.08 and 11,199.80

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Solution

The fourth proportional to 20,631.24, 28,471.08 and 11,199.80 is: 15,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.24 : 28,471.08 = 11,199.80 : x
  2. Step 2: Convert to fraction form
    20,631.24/28,471.08 = 11,199.80/x
  3. Step 3: Cross multiply
    20,631.24x = 28,471.08 × 11,199.80
  4. Step 4: Simplify right side
    20,631.24x = 318,870,401.78
  5. Step 5: Solve for x
    x = 318,870,401.78/20,631.24
  6. Step 6: Final answer
    x = 15,455.71

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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.