Home / 12,308.49-18,465.44-3,989.34

Finding the Fourth Proportional to 12,308.49, 18,465.44 and 3,989.34

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Solution

The fourth proportional to 12,308.49, 18,465.44 and 3,989.34 is: 5,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,308.49 : 18,465.44 = 3,989.34 : x
  2. Step 2: Convert to fraction form
    12,308.49/18,465.44 = 3,989.34/x
  3. Step 3: Cross multiply
    12,308.49x = 18,465.44 × 3,989.34
  4. Step 4: Simplify right side
    12,308.49x = 73,664,898.46
  5. Step 5: Solve for x
    x = 73,664,898.46/12,308.49
  6. Step 6: Final answer
    x = 5,984.89

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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.