Home / 20,838.12-28,733.67-13,275.96

Finding the Fourth Proportional to 20,838.12, 28,733.67 and 13,275.96

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Solution

The fourth proportional to 20,838.12, 28,733.67 and 13,275.96 is: 18,306.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.12 : 28,733.67 = 13,275.96 : x
  2. Step 2: Convert to fraction form
    20,838.12/28,733.67 = 13,275.96/x
  3. Step 3: Cross multiply
    20,838.12x = 28,733.67 × 13,275.96
  4. Step 4: Simplify right side
    20,838.12x = 381,467,053.57
  5. Step 5: Solve for x
    x = 381,467,053.57/20,838.12
  6. Step 6: Final answer
    x = 18,306.21

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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.