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Finding the Fourth Proportional to 18,869.63, 28,306.46 and 7,182.88

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Solution

The fourth proportional to 18,869.63, 28,306.46 and 7,182.88 is: 10,775.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.63 : 28,306.46 = 7,182.88 : x
  2. Step 2: Convert to fraction form
    18,869.63/28,306.46 = 7,182.88/x
  3. Step 3: Cross multiply
    18,869.63x = 28,306.46 × 7,182.88
  4. Step 4: Simplify right side
    18,869.63x = 203,321,852.60
  5. Step 5: Solve for x
    x = 203,321,852.60/18,869.63
  6. Step 6: Final answer
    x = 10,775.09

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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.