Home / 21,179.16-31,741.20-8,684.70

Finding the Fourth Proportional to 21,179.16, 31,741.20 and 8,684.70

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Solution

The fourth proportional to 21,179.16, 31,741.20 and 8,684.70 is: 13,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.16 : 31,741.20 = 8,684.70 : x
  2. Step 2: Convert to fraction form
    21,179.16/31,741.20 = 8,684.70/x
  3. Step 3: Cross multiply
    21,179.16x = 31,741.20 × 8,684.70
  4. Step 4: Simplify right side
    21,179.16x = 275,662,799.64
  5. Step 5: Solve for x
    x = 275,662,799.64/21,179.16
  6. Step 6: Final answer
    x = 13,015.76

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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.