Home / 20,511.90-28,304.64-11,558.57

Finding the Fourth Proportional to 20,511.90, 28,304.64 and 11,558.57

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Solution

The fourth proportional to 20,511.90, 28,304.64 and 11,558.57 is: 15,949.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.90 : 28,304.64 = 11,558.57 : x
  2. Step 2: Convert to fraction form
    20,511.90/28,304.64 = 11,558.57/x
  3. Step 3: Cross multiply
    20,511.90x = 28,304.64 × 11,558.57
  4. Step 4: Simplify right side
    20,511.90x = 327,161,021.24
  5. Step 5: Solve for x
    x = 327,161,021.24/20,511.90
  6. Step 6: Final answer
    x = 15,949.82

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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.