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Finding the Fourth Proportional to 20,630, 28,473 and 12,246.32

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Solution

The fourth proportional to 20,630, 28,473 and 12,246.32 is: 16,902.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630 : 28,473 = 12,246.32 : x
  2. Step 2: Convert to fraction form
    20,630/28,473 = 12,246.32/x
  3. Step 3: Cross multiply
    20,630x = 28,473 × 12,246.32
  4. Step 4: Simplify right side
    20,630x = 348,689,469.36
  5. Step 5: Solve for x
    x = 348,689,469.36/20,630
  6. Step 6: Final answer
    x = 16,902.06

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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.