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Finding the Fourth Proportional to 12,663.35, 18,989.06 and 7,399.88

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Solution

The fourth proportional to 12,663.35, 18,989.06 and 7,399.88 is: 11,096.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.35 : 18,989.06 = 7,399.88 : x
  2. Step 2: Convert to fraction form
    12,663.35/18,989.06 = 7,399.88/x
  3. Step 3: Cross multiply
    12,663.35x = 18,989.06 × 7,399.88
  4. Step 4: Simplify right side
    12,663.35x = 140,516,762.50
  5. Step 5: Solve for x
    x = 140,516,762.50/12,663.35
  6. Step 6: Final answer
    x = 11,096.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.