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Finding the Fourth Proportional to 18,381.78, 27,557.07 and 7,296.30

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Solution

The fourth proportional to 18,381.78, 27,557.07 and 7,296.30 is: 10,938.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.78 : 27,557.07 = 7,296.30 : x
  2. Step 2: Convert to fraction form
    18,381.78/27,557.07 = 7,296.30/x
  3. Step 3: Cross multiply
    18,381.78x = 27,557.07 × 7,296.30
  4. Step 4: Simplify right side
    18,381.78x = 201,064,649.84
  5. Step 5: Solve for x
    x = 201,064,649.84/18,381.78
  6. Step 6: Final answer
    x = 10,938.26

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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.