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Finding the Fourth Proportional to 12,692.79, 17,505.36 and 9,513.54

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Solution

The fourth proportional to 12,692.79, 17,505.36 and 9,513.54 is: 13,120.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.79 : 17,505.36 = 9,513.54 : x
  2. Step 2: Convert to fraction form
    12,692.79/17,505.36 = 9,513.54/x
  3. Step 3: Cross multiply
    12,692.79x = 17,505.36 × 9,513.54
  4. Step 4: Simplify right side
    12,692.79x = 166,537,942.57
  5. Step 5: Solve for x
    x = 166,537,942.57/12,692.79
  6. Step 6: Final answer
    x = 13,120.67

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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.