Home / 12,308.18-18,462.54-3,985.70

Finding the Fourth Proportional to 12,308.18, 18,462.54 and 3,985.70

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Solution

The fourth proportional to 12,308.18, 18,462.54 and 3,985.70 is: 5,978.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,308.18 : 18,462.54 = 3,985.70 : x
  2. Step 2: Convert to fraction form
    12,308.18/18,462.54 = 3,985.70/x
  3. Step 3: Cross multiply
    12,308.18x = 18,462.54 × 3,985.70
  4. Step 4: Simplify right side
    12,308.18x = 73,586,145.68
  5. Step 5: Solve for x
    x = 73,586,145.68/12,308.18
  6. Step 6: Final answer
    x = 5,978.64

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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.