Home / 13,387.12-18,476.40-12,796.54

Finding the Fourth Proportional to 13,387.12, 18,476.40 and 12,796.54

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Solution

The fourth proportional to 13,387.12, 18,476.40 and 12,796.54 is: 17,661.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.12 : 18,476.40 = 12,796.54 : x
  2. Step 2: Convert to fraction form
    13,387.12/18,476.40 = 12,796.54/x
  3. Step 3: Cross multiply
    13,387.12x = 18,476.40 × 12,796.54
  4. Step 4: Simplify right side
    13,387.12x = 236,433,991.66
  5. Step 5: Solve for x
    x = 236,433,991.66/13,387.12
  6. Step 6: Final answer
    x = 17,661.30

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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.