Home / 21,276.96-31,911.33-8,126.22

Finding the Fourth Proportional to 21,276.96, 31,911.33 and 8,126.22

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Solution

The fourth proportional to 21,276.96, 31,911.33 and 8,126.22 is: 12,187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.96 : 31,911.33 = 8,126.22 : x
  2. Step 2: Convert to fraction form
    21,276.96/31,911.33 = 8,126.22/x
  3. Step 3: Cross multiply
    21,276.96x = 31,911.33 × 8,126.22
  4. Step 4: Simplify right side
    21,276.96x = 259,318,488.07
  5. Step 5: Solve for x
    x = 259,318,488.07/21,276.96
  6. Step 6: Final answer
    x = 12,187.76

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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.