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Finding the Fourth Proportional to 12,038.40, 16,692.80 and 11,644.80

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Solution

The fourth proportional to 12,038.40, 16,692.80 and 11,644.80 is: 16,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,038.40 : 16,692.80 = 11,644.80 : x
  2. Step 2: Convert to fraction form
    12,038.40/16,692.80 = 11,644.80/x
  3. Step 3: Cross multiply
    12,038.40x = 16,692.80 × 11,644.80
  4. Step 4: Simplify right side
    12,038.40x = 194,384,317.44
  5. Step 5: Solve for x
    x = 194,384,317.44/12,038.40
  6. Step 6: Final answer
    x = 16,147.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.