Home / 20,812.42-28,721.73-11,381.14

Finding the Fourth Proportional to 20,812.42, 28,721.73 and 11,381.14

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Solution

The fourth proportional to 20,812.42, 28,721.73 and 11,381.14 is: 15,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.42 : 28,721.73 = 11,381.14 : x
  2. Step 2: Convert to fraction form
    20,812.42/28,721.73 = 11,381.14/x
  3. Step 3: Cross multiply
    20,812.42x = 28,721.73 × 11,381.14
  4. Step 4: Simplify right side
    20,812.42x = 326,886,030.17
  5. Step 5: Solve for x
    x = 326,886,030.17/20,812.42
  6. Step 6: Final answer
    x = 15,706.30

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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.