Home / 13,207.82-18,215.16-8,171.24

Finding the Fourth Proportional to 13,207.82, 18,215.16 and 8,171.24

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Solution

The fourth proportional to 13,207.82, 18,215.16 and 8,171.24 is: 11,269.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,207.82 : 18,215.16 = 8,171.24 : x
  2. Step 2: Convert to fraction form
    13,207.82/18,215.16 = 8,171.24/x
  3. Step 3: Cross multiply
    13,207.82x = 18,215.16 × 8,171.24
  4. Step 4: Simplify right side
    13,207.82x = 148,840,444.00
  5. Step 5: Solve for x
    x = 148,840,444.00/13,207.82
  6. Step 6: Final answer
    x = 11,269.12

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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.