Home / 13,179.12-18,179.28-8,702.88

Finding the Fourth Proportional to 13,179.12, 18,179.28 and 8,702.88

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Solution

The fourth proportional to 13,179.12, 18,179.28 and 8,702.88 is: 12,004.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.12 : 18,179.28 = 8,702.88 : x
  2. Step 2: Convert to fraction form
    13,179.12/18,179.28 = 8,702.88/x
  3. Step 3: Cross multiply
    13,179.12x = 18,179.28 × 8,702.88
  4. Step 4: Simplify right side
    13,179.12x = 158,212,092.33
  5. Step 5: Solve for x
    x = 158,212,092.33/13,179.12
  6. Step 6: Final answer
    x = 12,004.75

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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.