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Finding the Fourth Proportional to 20,893.52, 28,833.72 and 11,462.72

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Solution

The fourth proportional to 20,893.52, 28,833.72 and 11,462.72 is: 15,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.52 : 28,833.72 = 11,462.72 : x
  2. Step 2: Convert to fraction form
    20,893.52/28,833.72 = 11,462.72/x
  3. Step 3: Cross multiply
    20,893.52x = 28,833.72 × 11,462.72
  4. Step 4: Simplify right side
    20,893.52x = 330,512,858.92
  5. Step 5: Solve for x
    x = 330,512,858.92/20,893.52
  6. Step 6: Final answer
    x = 15,818.92

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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.