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Finding the Fourth Proportional to 18,145.30, 27,218.11 and 4,998.40

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Solution

The fourth proportional to 18,145.30, 27,218.11 and 4,998.40 is: 7,497.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.30 : 27,218.11 = 4,998.40 : x
  2. Step 2: Convert to fraction form
    18,145.30/27,218.11 = 4,998.40/x
  3. Step 3: Cross multiply
    18,145.30x = 27,218.11 × 4,998.40
  4. Step 4: Simplify right side
    18,145.30x = 136,047,001.02
  5. Step 5: Solve for x
    x = 136,047,001.02/18,145.30
  6. Step 6: Final answer
    x = 7,497.64

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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.