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Finding the Fourth Proportional to 14,805.62, 20,431.76 and 7,999.64

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Solution

The fourth proportional to 14,805.62, 20,431.76 and 7,999.64 is: 11,039.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,805.62 : 20,431.76 = 7,999.64 : x
  2. Step 2: Convert to fraction form
    14,805.62/20,431.76 = 7,999.64/x
  3. Step 3: Cross multiply
    14,805.62x = 20,431.76 × 7,999.64
  4. Step 4: Simplify right side
    14,805.62x = 163,446,724.57
  5. Step 5: Solve for x
    x = 163,446,724.57/14,805.62
  6. Step 6: Final answer
    x = 11,039.51

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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.