Home / 11,931.88-17,905.98-4,140.64

Finding the Fourth Proportional to 11,931.88, 17,905.98 and 4,140.64

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Solution

The fourth proportional to 11,931.88, 17,905.98 and 4,140.64 is: 6,213.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.88 : 17,905.98 = 4,140.64 : x
  2. Step 2: Convert to fraction form
    11,931.88/17,905.98 = 4,140.64/x
  3. Step 3: Cross multiply
    11,931.88x = 17,905.98 × 4,140.64
  4. Step 4: Simplify right side
    11,931.88x = 74,142,217.03
  5. Step 5: Solve for x
    x = 74,142,217.03/11,931.88
  6. Step 6: Final answer
    x = 6,213.79

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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.