Home / 7,985.95-11,979.21-2,438.86

Finding the Fourth Proportional to 7,985.95, 11,979.21 and 2,438.86

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Solution

The fourth proportional to 7,985.95, 11,979.21 and 2,438.86 is: 3,658.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.95 : 11,979.21 = 2,438.86 : x
  2. Step 2: Convert to fraction form
    7,985.95/11,979.21 = 2,438.86/x
  3. Step 3: Cross multiply
    7,985.95x = 11,979.21 × 2,438.86
  4. Step 4: Simplify right side
    7,985.95x = 29,215,616.10
  5. Step 5: Solve for x
    x = 29,215,616.10/7,985.95
  6. Step 6: Final answer
    x = 3,658.38

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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.