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Finding the Fourth Proportional to 20,636, 28,465.52 and 12,252

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Solution

The fourth proportional to 20,636, 28,465.52 and 12,252 is: 16,900.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636 : 28,465.52 = 12,252 : x
  2. Step 2: Convert to fraction form
    20,636/28,465.52 = 12,252/x
  3. Step 3: Cross multiply
    20,636x = 28,465.52 × 12,252
  4. Step 4: Simplify right side
    20,636x = 348,759,551.04
  5. Step 5: Solve for x
    x = 348,759,551.04/20,636
  6. Step 6: Final answer
    x = 16,900.54

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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.