Home / 13,179.40-18,187.98-7,211.32

Finding the Fourth Proportional to 13,179.40, 18,187.98 and 7,211.32

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Solution

The fourth proportional to 13,179.40, 18,187.98 and 7,211.32 is: 9,951.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.40 : 18,187.98 = 7,211.32 : x
  2. Step 2: Convert to fraction form
    13,179.40/18,187.98 = 7,211.32/x
  3. Step 3: Cross multiply
    13,179.40x = 18,187.98 × 7,211.32
  4. Step 4: Simplify right side
    13,179.40x = 131,159,343.93
  5. Step 5: Solve for x
    x = 131,159,343.93/13,179.40
  6. Step 6: Final answer
    x = 9,951.84

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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.