Home / 20,812.42-28,721.83-11,380.98

Finding the Fourth Proportional to 20,812.42, 28,721.83 and 11,380.98

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Solution

The fourth proportional to 20,812.42, 28,721.83 and 11,380.98 is: 15,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.42 : 28,721.83 = 11,380.98 : x
  2. Step 2: Convert to fraction form
    20,812.42/28,721.83 = 11,380.98/x
  3. Step 3: Cross multiply
    20,812.42x = 28,721.83 × 11,380.98
  4. Step 4: Simplify right side
    20,812.42x = 326,882,572.79
  5. Step 5: Solve for x
    x = 326,882,572.79/20,812.42
  6. Step 6: Final answer
    x = 15,706.13

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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.