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Finding the Fourth Proportional to 13,692.96, 18,893.52 and 8,658.72

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Solution

The fourth proportional to 13,692.96, 18,893.52 and 8,658.72 is: 11,947.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.96 : 18,893.52 = 8,658.72 : x
  2. Step 2: Convert to fraction form
    13,692.96/18,893.52 = 8,658.72/x
  3. Step 3: Cross multiply
    13,692.96x = 18,893.52 × 8,658.72
  4. Step 4: Simplify right side
    13,692.96x = 163,593,699.49
  5. Step 5: Solve for x
    x = 163,593,699.49/13,692.96
  6. Step 6: Final answer
    x = 11,947.29

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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.