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Finding the Fourth Proportional to 18,381.61, 27,364.54 and 18,272.26

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Solution

The fourth proportional to 18,381.61, 27,364.54 and 18,272.26 is: 27,201.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.61 : 27,364.54 = 18,272.26 : x
  2. Step 2: Convert to fraction form
    18,381.61/27,364.54 = 18,272.26/x
  3. Step 3: Cross multiply
    18,381.61x = 27,364.54 × 18,272.26
  4. Step 4: Simplify right side
    18,381.61x = 500,011,989.66
  5. Step 5: Solve for x
    x = 500,011,989.66/18,381.61
  6. Step 6: Final answer
    x = 27,201.75

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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.