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Finding the Fourth Proportional to 18,015.12, 27,020.40 and 4,868.40

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Solution

The fourth proportional to 18,015.12, 27,020.40 and 4,868.40 is: 7,301.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.12 : 27,020.40 = 4,868.40 : x
  2. Step 2: Convert to fraction form
    18,015.12/27,020.40 = 4,868.40/x
  3. Step 3: Cross multiply
    18,015.12x = 27,020.40 × 4,868.40
  4. Step 4: Simplify right side
    18,015.12x = 131,546,115.36
  5. Step 5: Solve for x
    x = 131,546,115.36/18,015.12
  6. Step 6: Final answer
    x = 7,301.98

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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.