Home / 7,909.45-11,857.79-2,978.37

Finding the Fourth Proportional to 7,909.45, 11,857.79 and 2,978.37

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Solution

The fourth proportional to 7,909.45, 11,857.79 and 2,978.37 is: 4,465.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.45 : 11,857.79 = 2,978.37 : x
  2. Step 2: Convert to fraction form
    7,909.45/11,857.79 = 2,978.37/x
  3. Step 3: Cross multiply
    7,909.45x = 11,857.79 × 2,978.37
  4. Step 4: Simplify right side
    7,909.45x = 35,316,893.45
  5. Step 5: Solve for x
    x = 35,316,893.45/7,909.45
  6. Step 6: Final answer
    x = 4,465.15

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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.