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Finding the Fourth Proportional to 18,185.63, 27,278.34 and 4,676.78

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Solution

The fourth proportional to 18,185.63, 27,278.34 and 4,676.78 is: 7,015.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,185.63 : 27,278.34 = 4,676.78 : x
  2. Step 2: Convert to fraction form
    18,185.63/27,278.34 = 4,676.78/x
  3. Step 3: Cross multiply
    18,185.63x = 27,278.34 × 4,676.78
  4. Step 4: Simplify right side
    18,185.63x = 127,574,658.55
  5. Step 5: Solve for x
    x = 127,574,658.55/18,185.63
  6. Step 6: Final answer
    x = 7,015.14

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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.