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Finding the Fourth Proportional to 13,692.75, 18,895.95 and 7,405.11

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Solution

The fourth proportional to 13,692.75, 18,895.95 and 7,405.11 is: 10,219.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.75 : 18,895.95 = 7,405.11 : x
  2. Step 2: Convert to fraction form
    13,692.75/18,895.95 = 7,405.11/x
  3. Step 3: Cross multiply
    13,692.75x = 18,895.95 × 7,405.11
  4. Step 4: Simplify right side
    13,692.75x = 139,926,588.30
  5. Step 5: Solve for x
    x = 139,926,588.30/13,692.75
  6. Step 6: Final answer
    x = 10,219.03

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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.