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Finding the Fourth Proportional to 20,893.68, 28,833.95 and 11,463.12

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Solution

The fourth proportional to 20,893.68, 28,833.95 and 11,463.12 is: 15,819.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.68 : 28,833.95 = 11,463.12 : x
  2. Step 2: Convert to fraction form
    20,893.68/28,833.95 = 11,463.12/x
  3. Step 3: Cross multiply
    20,893.68x = 28,833.95 × 11,463.12
  4. Step 4: Simplify right side
    20,893.68x = 330,527,028.92
  5. Step 5: Solve for x
    x = 330,527,028.92/20,893.68
  6. Step 6: Final answer
    x = 15,819.47

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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.