Home / 13,631.36-20,420.97-11,424.31

Finding the Fourth Proportional to 13,631.36, 20,420.97 and 11,424.31

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Solution

The fourth proportional to 13,631.36, 20,420.97 and 11,424.31 is: 17,114.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.36 : 20,420.97 = 11,424.31 : x
  2. Step 2: Convert to fraction form
    13,631.36/20,420.97 = 11,424.31/x
  3. Step 3: Cross multiply
    13,631.36x = 20,420.97 × 11,424.31
  4. Step 4: Simplify right side
    13,631.36x = 233,295,491.78
  5. Step 5: Solve for x
    x = 233,295,491.78/13,631.36
  6. Step 6: Final answer
    x = 17,114.62

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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.