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Finding the Fourth Proportional to 13,700, 18,905.96 and 7,412.36

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Solution

The fourth proportional to 13,700, 18,905.96 and 7,412.36 is: 10,229.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700 : 18,905.96 = 7,412.36 : x
  2. Step 2: Convert to fraction form
    13,700/18,905.96 = 7,412.36/x
  3. Step 3: Cross multiply
    13,700x = 18,905.96 × 7,412.36
  4. Step 4: Simplify right side
    13,700x = 140,137,781.67
  5. Step 5: Solve for x
    x = 140,137,781.67/13,700
  6. Step 6: Final answer
    x = 10,229.04

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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.