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Finding the Fourth Proportional to 18,486.40, 27,729.60 and 6,174.40

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Solution

The fourth proportional to 18,486.40, 27,729.60 and 6,174.40 is: 9,261.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.40 : 27,729.60 = 6,174.40 : x
  2. Step 2: Convert to fraction form
    18,486.40/27,729.60 = 6,174.40/x
  3. Step 3: Cross multiply
    18,486.40x = 27,729.60 × 6,174.40
  4. Step 4: Simplify right side
    18,486.40x = 171,213,642.24
  5. Step 5: Solve for x
    x = 171,213,642.24/18,486.40
  6. Step 6: Final answer
    x = 9,261.60

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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.