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Finding the Fourth Proportional to 14,487.92, 19,992.20 and 8,201.28

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Solution

The fourth proportional to 14,487.92, 19,992.20 and 8,201.28 is: 11,317.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,487.92 : 19,992.20 = 8,201.28 : x
  2. Step 2: Convert to fraction form
    14,487.92/19,992.20 = 8,201.28/x
  3. Step 3: Cross multiply
    14,487.92x = 19,992.20 × 8,201.28
  4. Step 4: Simplify right side
    14,487.92x = 163,961,630.02
  5. Step 5: Solve for x
    x = 163,961,630.02/14,487.92
  6. Step 6: Final answer
    x = 11,317.13

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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.