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Finding the Fourth Proportional to 13,385.25, 18,472.05 and 7,416.36

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Solution

The fourth proportional to 13,385.25, 18,472.05 and 7,416.36 is: 10,234.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.25 : 18,472.05 = 7,416.36 : x
  2. Step 2: Convert to fraction form
    13,385.25/18,472.05 = 7,416.36/x
  3. Step 3: Cross multiply
    13,385.25x = 18,472.05 × 7,416.36
  4. Step 4: Simplify right side
    13,385.25x = 136,995,372.74
  5. Step 5: Solve for x
    x = 136,995,372.74/13,385.25
  6. Step 6: Final answer
    x = 10,234.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.