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Finding the Fourth Proportional to 20,456.60, 30,620.10 and 14,624.60

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Solution

The fourth proportional to 20,456.60, 30,620.10 and 14,624.60 is: 21,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.60 : 30,620.10 = 14,624.60 : x
  2. Step 2: Convert to fraction form
    20,456.60/30,620.10 = 14,624.60/x
  3. Step 3: Cross multiply
    20,456.60x = 30,620.10 × 14,624.60
  4. Step 4: Simplify right side
    20,456.60x = 447,806,714.46
  5. Step 5: Solve for x
    x = 447,806,714.46/20,456.60
  6. Step 6: Final answer
    x = 21,890.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.