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Finding the Fourth Proportional to 12,692.13, 17,515.16 and 7,390.50

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Solution

The fourth proportional to 12,692.13, 17,515.16 and 7,390.50 is: 10,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.13 : 17,515.16 = 7,390.50 : x
  2. Step 2: Convert to fraction form
    12,692.13/17,515.16 = 7,390.50/x
  3. Step 3: Cross multiply
    12,692.13x = 17,515.16 × 7,390.50
  4. Step 4: Simplify right side
    12,692.13x = 129,445,789.98
  5. Step 5: Solve for x
    x = 129,445,789.98/12,692.13
  6. Step 6: Final answer
    x = 10,198.90

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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.