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Finding the Fourth Proportional to 14,618.64, 20,172.60 and 8,331.60

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Solution

The fourth proportional to 14,618.64, 20,172.60 and 8,331.60 is: 11,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,618.64 : 20,172.60 = 8,331.60 : x
  2. Step 2: Convert to fraction form
    14,618.64/20,172.60 = 8,331.60/x
  3. Step 3: Cross multiply
    14,618.64x = 20,172.60 × 8,331.60
  4. Step 4: Simplify right side
    14,618.64x = 168,070,034.16
  5. Step 5: Solve for x
    x = 168,070,034.16/14,618.64
  6. Step 6: Final answer
    x = 11,496.97

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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.