Home / 11,985.84-17,977.55-3,221.64

Finding the Fourth Proportional to 11,985.84, 17,977.55 and 3,221.64

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Solution

The fourth proportional to 11,985.84, 17,977.55 and 3,221.64 is: 4,832.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.84 : 17,977.55 = 3,221.64 : x
  2. Step 2: Convert to fraction form
    11,985.84/17,977.55 = 3,221.64/x
  3. Step 3: Cross multiply
    11,985.84x = 17,977.55 × 3,221.64
  4. Step 4: Simplify right side
    11,985.84x = 57,917,178.07
  5. Step 5: Solve for x
    x = 57,917,178.07/11,985.84
  6. Step 6: Final answer
    x = 4,832.13

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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.