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Finding the Fourth Proportional to 18,405.72, 27,731.52 and 16,652.97

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Solution

The fourth proportional to 18,405.72, 27,731.52 and 16,652.97 is: 25,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.72 : 27,731.52 = 16,652.97 : x
  2. Step 2: Convert to fraction form
    18,405.72/27,731.52 = 16,652.97/x
  3. Step 3: Cross multiply
    18,405.72x = 27,731.52 × 16,652.97
  4. Step 4: Simplify right side
    18,405.72x = 461,812,170.61
  5. Step 5: Solve for x
    x = 461,812,170.61/18,405.72
  6. Step 6: Final answer
    x = 25,090.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.