Home / 12,438.86-18,660.09-3,672.63

Finding the Fourth Proportional to 12,438.86, 18,660.09 and 3,672.63

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Solution

The fourth proportional to 12,438.86, 18,660.09 and 3,672.63 is: 5,509.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.86 : 18,660.09 = 3,672.63 : x
  2. Step 2: Convert to fraction form
    12,438.86/18,660.09 = 3,672.63/x
  3. Step 3: Cross multiply
    12,438.86x = 18,660.09 × 3,672.63
  4. Step 4: Simplify right side
    12,438.86x = 68,531,606.34
  5. Step 5: Solve for x
    x = 68,531,606.34/12,438.86
  6. Step 6: Final answer
    x = 5,509.48

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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.