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Finding the Fourth Proportional to 18,675, 28,018.08 and 7,579.56

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Solution

The fourth proportional to 18,675, 28,018.08 and 7,579.56 is: 11,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,675 : 28,018.08 = 7,579.56 : x
  2. Step 2: Convert to fraction form
    18,675/28,018.08 = 7,579.56/x
  3. Step 3: Cross multiply
    18,675x = 28,018.08 × 7,579.56
  4. Step 4: Simplify right side
    18,675x = 212,364,718.44
  5. Step 5: Solve for x
    x = 212,364,718.44/18,675
  6. Step 6: Final answer
    x = 11,371.60

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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.