Home / 21,171.22-31,736.10-11,815.72

Finding the Fourth Proportional to 21,171.22, 31,736.10 and 11,815.72

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Solution

The fourth proportional to 21,171.22, 31,736.10 and 11,815.72 is: 17,712.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.22 : 31,736.10 = 11,815.72 : x
  2. Step 2: Convert to fraction form
    21,171.22/31,736.10 = 11,815.72/x
  3. Step 3: Cross multiply
    21,171.22x = 31,736.10 × 11,815.72
  4. Step 4: Simplify right side
    21,171.22x = 374,985,014.98
  5. Step 5: Solve for x
    x = 374,985,014.98/21,171.22
  6. Step 6: Final answer
    x = 17,712.01

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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.