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Finding the Fourth Proportional to 14,805.84, 20,431.48 and 8,091.55

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Solution

The fourth proportional to 14,805.84, 20,431.48 and 8,091.55 is: 11,166.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,805.84 : 20,431.48 = 8,091.55 : x
  2. Step 2: Convert to fraction form
    14,805.84/20,431.48 = 8,091.55/x
  3. Step 3: Cross multiply
    14,805.84x = 20,431.48 × 8,091.55
  4. Step 4: Simplify right side
    14,805.84x = 165,322,341.99
  5. Step 5: Solve for x
    x = 165,322,341.99/14,805.84
  6. Step 6: Final answer
    x = 11,166.02

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Double scale
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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.