Home / 13,179.92-18,188.13-7,211.51

Finding the Fourth Proportional to 13,179.92, 18,188.13 and 7,211.51

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Solution

The fourth proportional to 13,179.92, 18,188.13 and 7,211.51 is: 9,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.92 : 18,188.13 = 7,211.51 : x
  2. Step 2: Convert to fraction form
    13,179.92/18,188.13 = 7,211.51/x
  3. Step 3: Cross multiply
    13,179.92x = 18,188.13 × 7,211.51
  4. Step 4: Simplify right side
    13,179.92x = 131,163,881.38
  5. Step 5: Solve for x
    x = 131,163,881.38/13,179.92
  6. Step 6: Final answer
    x = 9,951.80

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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.