Home / 13,179.70-18,189.66-8,646.21

Finding the Fourth Proportional to 13,179.70, 18,189.66 and 8,646.21

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Solution

The fourth proportional to 13,179.70, 18,189.66 and 8,646.21 is: 11,932.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.70 : 18,189.66 = 8,646.21 : x
  2. Step 2: Convert to fraction form
    13,179.70/18,189.66 = 8,646.21/x
  3. Step 3: Cross multiply
    13,179.70x = 18,189.66 × 8,646.21
  4. Step 4: Simplify right side
    13,179.70x = 157,271,620.19
  5. Step 5: Solve for x
    x = 157,271,620.19/13,179.70
  6. Step 6: Final answer
    x = 11,932.87

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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.