Home / 21,279.76-31,905.93-10,186.18

Finding the Fourth Proportional to 21,279.76, 31,905.93 and 10,186.18

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Solution

The fourth proportional to 21,279.76, 31,905.93 and 10,186.18 is: 15,272.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.76 : 31,905.93 = 10,186.18 : x
  2. Step 2: Convert to fraction form
    21,279.76/31,905.93 = 10,186.18/x
  3. Step 3: Cross multiply
    21,279.76x = 31,905.93 × 10,186.18
  4. Step 4: Simplify right side
    21,279.76x = 324,999,546.05
  5. Step 5: Solve for x
    x = 324,999,546.05/21,279.76
  6. Step 6: Final answer
    x = 15,272.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.