Home / 20,715.24-31,060.86-14,149.36

Finding the Fourth Proportional to 20,715.24, 31,060.86 and 14,149.36

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Solution

The fourth proportional to 20,715.24, 31,060.86 and 14,149.36 is: 21,215.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.24 : 31,060.86 = 14,149.36 : x
  2. Step 2: Convert to fraction form
    20,715.24/31,060.86 = 14,149.36/x
  3. Step 3: Cross multiply
    20,715.24x = 31,060.86 × 14,149.36
  4. Step 4: Simplify right side
    20,715.24x = 439,491,290.05
  5. Step 5: Solve for x
    x = 439,491,290.05/20,715.24
  6. Step 6: Final answer
    x = 21,215.84

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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.