Home / 20,519.78-28,315.31-11,566.44

Finding the Fourth Proportional to 20,519.78, 28,315.31 and 11,566.44

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Solution

The fourth proportional to 20,519.78, 28,315.31 and 11,566.44 is: 15,960.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.78 : 28,315.31 = 11,566.44 : x
  2. Step 2: Convert to fraction form
    20,519.78/28,315.31 = 11,566.44/x
  3. Step 3: Cross multiply
    20,519.78x = 28,315.31 × 11,566.44
  4. Step 4: Simplify right side
    20,519.78x = 327,507,276.36
  5. Step 5: Solve for x
    x = 327,507,276.36/20,519.78
  6. Step 6: Final answer
    x = 15,960.57

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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.