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Finding the Fourth Proportional to 13,692.90, 20,549.08 and 12,370.98

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Solution

The fourth proportional to 13,692.90, 20,549.08 and 12,370.98 is: 18,565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.90 : 20,549.08 = 12,370.98 : x
  2. Step 2: Convert to fraction form
    13,692.90/20,549.08 = 12,370.98/x
  3. Step 3: Cross multiply
    13,692.90x = 20,549.08 × 12,370.98
  4. Step 4: Simplify right side
    13,692.90x = 254,212,257.70
  5. Step 5: Solve for x
    x = 254,212,257.70/13,692.90
  6. Step 6: Final answer
    x = 18,565.26

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1.5x scale

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.