Home / 20,519-28,316.22-11,687

Finding the Fourth Proportional to 20,519, 28,316.22 and 11,687

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Solution

The fourth proportional to 20,519, 28,316.22 and 11,687 is: 16,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519 : 28,316.22 = 11,687 : x
  2. Step 2: Convert to fraction form
    20,519/28,316.22 = 11,687/x
  3. Step 3: Cross multiply
    20,519x = 28,316.22 × 11,687
  4. Step 4: Simplify right side
    20,519x = 330,931,663.14
  5. Step 5: Solve for x
    x = 330,931,663.14/20,519
  6. Step 6: Final answer
    x = 16,128.06

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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.