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Finding the Fourth Proportional to 18,078.25, 27,114.63 and 4,931.65

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Solution

The fourth proportional to 18,078.25, 27,114.63 and 4,931.65 is: 7,396.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.25 : 27,114.63 = 4,931.65 : x
  2. Step 2: Convert to fraction form
    18,078.25/27,114.63 = 4,931.65/x
  3. Step 3: Cross multiply
    18,078.25x = 27,114.63 × 4,931.65
  4. Step 4: Simplify right side
    18,078.25x = 133,719,865.04
  5. Step 5: Solve for x
    x = 133,719,865.04/18,078.25
  6. Step 6: Final answer
    x = 7,396.73

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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.