Home / 21,139.88-31,700.64-11,276.96

Finding the Fourth Proportional to 21,139.88, 31,700.64 and 11,276.96

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Solution

The fourth proportional to 21,139.88, 31,700.64 and 11,276.96 is: 16,910.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.88 : 31,700.64 = 11,276.96 : x
  2. Step 2: Convert to fraction form
    21,139.88/31,700.64 = 11,276.96/x
  3. Step 3: Cross multiply
    21,139.88x = 31,700.64 × 11,276.96
  4. Step 4: Simplify right side
    21,139.88x = 357,486,849.25
  5. Step 5: Solve for x
    x = 357,486,849.25/21,139.88
  6. Step 6: Final answer
    x = 16,910.54

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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.