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Finding the Fourth Proportional to 14,490.76, 19,997.22 and 8,203.72

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Solution

The fourth proportional to 14,490.76, 19,997.22 and 8,203.72 is: 11,321.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.76 : 19,997.22 = 8,203.72 : x
  2. Step 2: Convert to fraction form
    14,490.76/19,997.22 = 8,203.72/x
  3. Step 3: Cross multiply
    14,490.76x = 19,997.22 × 8,203.72
  4. Step 4: Simplify right side
    14,490.76x = 164,051,593.66
  5. Step 5: Solve for x
    x = 164,051,593.66/14,490.76
  6. Step 6: Final answer
    x = 11,321.12

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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.