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Finding the Fourth Proportional to 18,751.80, 28,123.88 and 6,901.52

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Solution

The fourth proportional to 18,751.80, 28,123.88 and 6,901.52 is: 10,350.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.80 : 28,123.88 = 6,901.52 : x
  2. Step 2: Convert to fraction form
    18,751.80/28,123.88 = 6,901.52/x
  3. Step 3: Cross multiply
    18,751.80x = 28,123.88 × 6,901.52
  4. Step 4: Simplify right side
    18,751.80x = 194,097,520.30
  5. Step 5: Solve for x
    x = 194,097,520.30/18,751.80
  6. Step 6: Final answer
    x = 10,350.87

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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.