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Finding the Fourth Proportional to 18,681.44, 27,992.96 and 15,896.72

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Solution

The fourth proportional to 18,681.44, 27,992.96 and 15,896.72 is: 23,820.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.44 : 27,992.96 = 15,896.72 : x
  2. Step 2: Convert to fraction form
    18,681.44/27,992.96 = 15,896.72/x
  3. Step 3: Cross multiply
    18,681.44x = 27,992.96 × 15,896.72
  4. Step 4: Simplify right side
    18,681.44x = 444,996,247.09
  5. Step 5: Solve for x
    x = 444,996,247.09/18,681.44
  6. Step 6: Final answer
    x = 23,820.23

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1.5x scale

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.