Home / 20,511.90-28,307.01-11,558.91

Finding the Fourth Proportional to 20,511.90, 28,307.01 and 11,558.91

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Solution

The fourth proportional to 20,511.90, 28,307.01 and 11,558.91 is: 15,951.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.90 : 28,307.01 = 11,558.91 : x
  2. Step 2: Convert to fraction form
    20,511.90/28,307.01 = 11,558.91/x
  3. Step 3: Cross multiply
    20,511.90x = 28,307.01 × 11,558.91
  4. Step 4: Simplify right side
    20,511.90x = 327,198,180.96
  5. Step 5: Solve for x
    x = 327,198,180.96/20,511.90
  6. Step 6: Final answer
    x = 15,951.63

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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.