Home / 13,491.30-20,238.42-5,178.38

Finding the Fourth Proportional to 13,491.30, 20,238.42 and 5,178.38

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Solution

The fourth proportional to 13,491.30, 20,238.42 and 5,178.38 is: 7,768.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.30 : 20,238.42 = 5,178.38 : x
  2. Step 2: Convert to fraction form
    13,491.30/20,238.42 = 5,178.38/x
  3. Step 3: Cross multiply
    13,491.30x = 20,238.42 × 5,178.38
  4. Step 4: Simplify right side
    13,491.30x = 104,802,229.36
  5. Step 5: Solve for x
    x = 104,802,229.36/13,491.30
  6. Step 6: Final answer
    x = 7,768.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.