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Finding the Fourth Proportional to 18,142.74, 27,081.48 and 16,807.20

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Solution

The fourth proportional to 18,142.74, 27,081.48 and 16,807.20 is: 25,087.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,142.74 : 27,081.48 = 16,807.20 : x
  2. Step 2: Convert to fraction form
    18,142.74/27,081.48 = 16,807.20/x
  3. Step 3: Cross multiply
    18,142.74x = 27,081.48 × 16,807.20
  4. Step 4: Simplify right side
    18,142.74x = 455,163,850.66
  5. Step 5: Solve for x
    x = 455,163,850.66/18,142.74
  6. Step 6: Final answer
    x = 25,087.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.