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Finding the Fourth Proportional to 18,798.52, 28,173.18 and 7,692.21

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Solution

The fourth proportional to 18,798.52, 28,173.18 and 7,692.21 is: 11,528.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.52 : 28,173.18 = 7,692.21 : x
  2. Step 2: Convert to fraction form
    18,798.52/28,173.18 = 7,692.21/x
  3. Step 3: Cross multiply
    18,798.52x = 28,173.18 × 7,692.21
  4. Step 4: Simplify right side
    18,798.52x = 216,714,016.93
  5. Step 5: Solve for x
    x = 216,714,016.93/18,798.52
  6. Step 6: Final answer
    x = 11,528.25

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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.