Home / 13,211.06-18,234.71-8,172.35

Finding the Fourth Proportional to 13,211.06, 18,234.71 and 8,172.35

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Solution

The fourth proportional to 13,211.06, 18,234.71 and 8,172.35 is: 11,279.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.06 : 18,234.71 = 8,172.35 : x
  2. Step 2: Convert to fraction form
    13,211.06/18,234.71 = 8,172.35/x
  3. Step 3: Cross multiply
    13,211.06x = 18,234.71 × 8,172.35
  4. Step 4: Simplify right side
    13,211.06x = 149,020,300.23
  5. Step 5: Solve for x
    x = 149,020,300.23/13,211.06
  6. Step 6: Final answer
    x = 11,279.97

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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.