Home / 20,630.99-28,471.08-11,199.56

Finding the Fourth Proportional to 20,630.99, 28,471.08 and 11,199.56

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Solution

The fourth proportional to 20,630.99, 28,471.08 and 11,199.56 is: 15,455.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.99 : 28,471.08 = 11,199.56 : x
  2. Step 2: Convert to fraction form
    20,630.99/28,471.08 = 11,199.56/x
  3. Step 3: Cross multiply
    20,630.99x = 28,471.08 × 11,199.56
  4. Step 4: Simplify right side
    20,630.99x = 318,863,426.37
  5. Step 5: Solve for x
    x = 318,863,426.37/20,630.99
  6. Step 6: Final answer
    x = 15,455.56

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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.