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Finding the Fourth Proportional to 18,692.40, 25,783.92 and 11,133.59

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Solution

The fourth proportional to 18,692.40, 25,783.92 and 11,133.59 is: 15,357.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.40 : 25,783.92 = 11,133.59 : x
  2. Step 2: Convert to fraction form
    18,692.40/25,783.92 = 11,133.59/x
  3. Step 3: Cross multiply
    18,692.40x = 25,783.92 × 11,133.59
  4. Step 4: Simplify right side
    18,692.40x = 287,067,464.95
  5. Step 5: Solve for x
    x = 287,067,464.95/18,692.40
  6. Step 6: Final answer
    x = 15,357.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.