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Finding the Fourth Proportional to 14,646.20, 20,211.90 and 8,360.60

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Solution

The fourth proportional to 14,646.20, 20,211.90 and 8,360.60 is: 11,537.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,646.20 : 20,211.90 = 8,360.60 : x
  2. Step 2: Convert to fraction form
    14,646.20/20,211.90 = 8,360.60/x
  3. Step 3: Cross multiply
    14,646.20x = 20,211.90 × 8,360.60
  4. Step 4: Simplify right side
    14,646.20x = 168,983,611.14
  5. Step 5: Solve for x
    x = 168,983,611.14/14,646.20
  6. Step 6: Final answer
    x = 11,537.71

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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.