Home / 21,356.92-29,467.56-12,399.03

Finding the Fourth Proportional to 21,356.92, 29,467.56 and 12,399.03

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Solution

The fourth proportional to 21,356.92, 29,467.56 and 12,399.03 is: 17,107.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.92 : 29,467.56 = 12,399.03 : x
  2. Step 2: Convert to fraction form
    21,356.92/29,467.56 = 12,399.03/x
  3. Step 3: Cross multiply
    21,356.92x = 29,467.56 × 12,399.03
  4. Step 4: Simplify right side
    21,356.92x = 365,369,206.96
  5. Step 5: Solve for x
    x = 365,369,206.96/21,356.92
  6. Step 6: Final answer
    x = 17,107.77

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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.