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Finding the Fourth Proportional to 13,692.60, 20,539.26 and 4,928.40

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Solution

The fourth proportional to 13,692.60, 20,539.26 and 4,928.40 is: 7,392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.60 : 20,539.26 = 4,928.40 : x
  2. Step 2: Convert to fraction form
    13,692.60/20,539.26 = 4,928.40/x
  3. Step 3: Cross multiply
    13,692.60x = 20,539.26 × 4,928.40
  4. Step 4: Simplify right side
    13,692.60x = 101,225,688.98
  5. Step 5: Solve for x
    x = 101,225,688.98/13,692.60
  6. Step 6: Final answer
    x = 7,392.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.