Home / 18,111.90-27,171.72-5,631.64

Finding the Fourth Proportional to 18,111.90, 27,171.72 and 5,631.64

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Solution

The fourth proportional to 18,111.90, 27,171.72 and 5,631.64 is: 8,448.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,111.90 : 27,171.72 = 5,631.64 : x
  2. Step 2: Convert to fraction form
    18,111.90/27,171.72 = 5,631.64/x
  3. Step 3: Cross multiply
    18,111.90x = 27,171.72 × 5,631.64
  4. Step 4: Simplify right side
    18,111.90x = 153,021,345.22
  5. Step 5: Solve for x
    x = 153,021,345.22/18,111.90
  6. Step 6: Final answer
    x = 8,448.66

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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.