Home / 20,947.72-28,907.12-11,516.22

Finding the Fourth Proportional to 20,947.72, 28,907.12 and 11,516.22

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Solution

The fourth proportional to 20,947.72, 28,907.12 and 11,516.22 is: 15,891.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.72 : 28,907.12 = 11,516.22 : x
  2. Step 2: Convert to fraction form
    20,947.72/28,907.12 = 11,516.22/x
  3. Step 3: Cross multiply
    20,947.72x = 28,907.12 × 11,516.22
  4. Step 4: Simplify right side
    20,947.72x = 332,900,753.49
  5. Step 5: Solve for x
    x = 332,900,753.49/20,947.72
  6. Step 6: Final answer
    x = 15,891.98

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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.