Home / 13,178.03-18,189.92-8,705.75

Finding the Fourth Proportional to 13,178.03, 18,189.92 and 8,705.75

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Solution

The fourth proportional to 13,178.03, 18,189.92 and 8,705.75 is: 12,016.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.03 : 18,189.92 = 8,705.75 : x
  2. Step 2: Convert to fraction form
    13,178.03/18,189.92 = 8,705.75/x
  3. Step 3: Cross multiply
    13,178.03x = 18,189.92 × 8,705.75
  4. Step 4: Simplify right side
    13,178.03x = 158,356,896.04
  5. Step 5: Solve for x
    x = 158,356,896.04/13,178.03
  6. Step 6: Final answer
    x = 12,016.74

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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.