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Finding the Fourth Proportional to 14,609.28, 20,160.48 and 8,321.28

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Solution

The fourth proportional to 14,609.28, 20,160.48 and 8,321.28 is: 11,483.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,609.28 : 20,160.48 = 8,321.28 : x
  2. Step 2: Convert to fraction form
    14,609.28/20,160.48 = 8,321.28/x
  3. Step 3: Cross multiply
    14,609.28x = 20,160.48 × 8,321.28
  4. Step 4: Simplify right side
    14,609.28x = 167,760,999.01
  5. Step 5: Solve for x
    x = 167,760,999.01/14,609.28
  6. Step 6: Final answer
    x = 11,483.18

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Double scale
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Similar ratio
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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.