Home / 20,949.10-28,911.53-11,519.48

Finding the Fourth Proportional to 20,949.10, 28,911.53 and 11,519.48

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Solution

The fourth proportional to 20,949.10, 28,911.53 and 11,519.48 is: 15,897.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.10 : 28,911.53 = 11,519.48 : x
  2. Step 2: Convert to fraction form
    20,949.10/28,911.53 = 11,519.48/x
  3. Step 3: Cross multiply
    20,949.10x = 28,911.53 × 11,519.48
  4. Step 4: Simplify right side
    20,949.10x = 333,045,892.68
  5. Step 5: Solve for x
    x = 333,045,892.68/20,949.10
  6. Step 6: Final answer
    x = 15,897.86

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1.5x scale

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.