Home / 21,081.36-31,627.80-7,231.44

Finding the Fourth Proportional to 21,081.36, 31,627.80 and 7,231.44

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Solution

The fourth proportional to 21,081.36, 31,627.80 and 7,231.44 is: 10,849.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.36 : 31,627.80 = 7,231.44 : x
  2. Step 2: Convert to fraction form
    21,081.36/31,627.80 = 7,231.44/x
  3. Step 3: Cross multiply
    21,081.36x = 31,627.80 × 7,231.44
  4. Step 4: Simplify right side
    21,081.36x = 228,714,538.03
  5. Step 5: Solve for x
    x = 228,714,538.03/21,081.36
  6. Step 6: Final answer
    x = 10,849.14

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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.