Home / 20,696.68-31,020.72-9,579.89

Finding the Fourth Proportional to 20,696.68, 31,020.72 and 9,579.89

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Solution

The fourth proportional to 20,696.68, 31,020.72 and 9,579.89 is: 14,358.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.68 : 31,020.72 = 9,579.89 : x
  2. Step 2: Convert to fraction form
    20,696.68/31,020.72 = 9,579.89/x
  3. Step 3: Cross multiply
    20,696.68x = 31,020.72 × 9,579.89
  4. Step 4: Simplify right side
    20,696.68x = 297,175,006.34
  5. Step 5: Solve for x
    x = 297,175,006.34/20,696.68
  6. Step 6: Final answer
    x = 14,358.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.