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Finding the Fourth Proportional to 18,017.75, 27,019.74 and 8,655.10

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Solution

The fourth proportional to 18,017.75, 27,019.74 and 8,655.10 is: 12,979.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,017.75 : 27,019.74 = 8,655.10 : x
  2. Step 2: Convert to fraction form
    18,017.75/27,019.74 = 8,655.10/x
  3. Step 3: Cross multiply
    18,017.75x = 27,019.74 × 8,655.10
  4. Step 4: Simplify right side
    18,017.75x = 233,858,551.67
  5. Step 5: Solve for x
    x = 233,858,551.67/18,017.75
  6. Step 6: Final answer
    x = 12,979.34

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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.