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Finding the Fourth Proportional to 18,855.42, 28,283.21 and 6,375.51

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Solution

The fourth proportional to 18,855.42, 28,283.21 and 6,375.51 is: 9,563.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.42 : 28,283.21 = 6,375.51 : x
  2. Step 2: Convert to fraction form
    18,855.42/28,283.21 = 6,375.51/x
  3. Step 3: Cross multiply
    18,855.42x = 28,283.21 × 6,375.51
  4. Step 4: Simplify right side
    18,855.42x = 180,319,856.31
  5. Step 5: Solve for x
    x = 180,319,856.31/18,855.42
  6. Step 6: Final answer
    x = 9,563.29

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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.