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Finding the Fourth Proportional to 27,647, 38,139.72 and 18,697.64

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Solution

The fourth proportional to 27,647, 38,139.72 and 18,697.64 is: 25,793.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,647 : 38,139.72 = 18,697.64 : x
  2. Step 2: Convert to fraction form
    27,647/38,139.72 = 18,697.64/x
  3. Step 3: Cross multiply
    27,647x = 38,139.72 × 18,697.64
  4. Step 4: Simplify right side
    27,647x = 713,122,754.26
  5. Step 5: Solve for x
    x = 713,122,754.26/27,647
  6. Step 6: Final answer
    x = 25,793.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.