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Finding the Fourth Proportional to 18,627.30, 27,943.65 and 6,145.20

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Solution

The fourth proportional to 18,627.30, 27,943.65 and 6,145.20 is: 9,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,627.30 : 27,943.65 = 6,145.20 : x
  2. Step 2: Convert to fraction form
    18,627.30/27,943.65 = 6,145.20/x
  3. Step 3: Cross multiply
    18,627.30x = 27,943.65 × 6,145.20
  4. Step 4: Simplify right side
    18,627.30x = 171,719,317.98
  5. Step 5: Solve for x
    x = 171,719,317.98/18,627.30
  6. Step 6: Final answer
    x = 9,218.69

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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.