Home / 21,173.02-29,209.31-13,617.92

Finding the Fourth Proportional to 21,173.02, 29,209.31 and 13,617.92

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Solution

The fourth proportional to 21,173.02, 29,209.31 and 13,617.92 is: 18,786.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.02 : 29,209.31 = 13,617.92 : x
  2. Step 2: Convert to fraction form
    21,173.02/29,209.31 = 13,617.92/x
  3. Step 3: Cross multiply
    21,173.02x = 29,209.31 × 13,617.92
  4. Step 4: Simplify right side
    21,173.02x = 397,770,046.84
  5. Step 5: Solve for x
    x = 397,770,046.84/21,173.02
  6. Step 6: Final answer
    x = 18,786.65

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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.