Home / 20,947.52-28,908.32-11,516.80

Finding the Fourth Proportional to 20,947.52, 28,908.32 and 11,516.80

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Solution

The fourth proportional to 20,947.52, 28,908.32 and 11,516.80 is: 15,893.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.52 : 28,908.32 = 11,516.80 : x
  2. Step 2: Convert to fraction form
    20,947.52/28,908.32 = 11,516.80/x
  3. Step 3: Cross multiply
    20,947.52x = 28,908.32 × 11,516.80
  4. Step 4: Simplify right side
    20,947.52x = 332,931,339.78
  5. Step 5: Solve for x
    x = 332,931,339.78/20,947.52
  6. Step 6: Final answer
    x = 15,893.59

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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.