Home / 20,715.84-31,229.92-19,379.52

Finding the Fourth Proportional to 20,715.84, 31,229.92 and 19,379.52

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Solution

The fourth proportional to 20,715.84, 31,229.92 and 19,379.52 is: 29,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.84 : 31,229.92 = 19,379.52 : x
  2. Step 2: Convert to fraction form
    20,715.84/31,229.92 = 19,379.52/x
  3. Step 3: Cross multiply
    20,715.84x = 31,229.92 × 19,379.52
  4. Step 4: Simplify right side
    20,715.84x = 605,220,859.24
  5. Step 5: Solve for x
    x = 605,220,859.24/20,715.84
  6. Step 6: Final answer
    x = 29,215.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.