Home / 20,821.92-28,733.88-11,390.52

Finding the Fourth Proportional to 20,821.92, 28,733.88 and 11,390.52

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Solution

The fourth proportional to 20,821.92, 28,733.88 and 11,390.52 is: 15,718.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.92 : 28,733.88 = 11,390.52 : x
  2. Step 2: Convert to fraction form
    20,821.92/28,733.88 = 11,390.52/x
  3. Step 3: Cross multiply
    20,821.92x = 28,733.88 × 11,390.52
  4. Step 4: Simplify right side
    20,821.92x = 327,293,834.82
  5. Step 5: Solve for x
    x = 327,293,834.82/20,821.92
  6. Step 6: Final answer
    x = 15,718.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.