Home / 13,519.28-18,653.41-8,213.78

Finding the Fourth Proportional to 13,519.28, 18,653.41 and 8,213.78

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Solution

The fourth proportional to 13,519.28, 18,653.41 and 8,213.78 is: 11,333.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.28 : 18,653.41 = 8,213.78 : x
  2. Step 2: Convert to fraction form
    13,519.28/18,653.41 = 8,213.78/x
  3. Step 3: Cross multiply
    13,519.28x = 18,653.41 × 8,213.78
  4. Step 4: Simplify right side
    13,519.28x = 153,215,005.99
  5. Step 5: Solve for x
    x = 153,215,005.99/13,519.28
  6. Step 6: Final answer
    x = 11,333.07

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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.