Home / 20,643.20-28,489.38-11,692.30

Finding the Fourth Proportional to 20,643.20, 28,489.38 and 11,692.30

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Solution

The fourth proportional to 20,643.20, 28,489.38 and 11,692.30 is: 16,136.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.20 : 28,489.38 = 11,692.30 : x
  2. Step 2: Convert to fraction form
    20,643.20/28,489.38 = 11,692.30/x
  3. Step 3: Cross multiply
    20,643.20x = 28,489.38 × 11,692.30
  4. Step 4: Simplify right side
    20,643.20x = 333,106,306.55
  5. Step 5: Solve for x
    x = 333,106,306.55/20,643.20
  6. Step 6: Final answer
    x = 16,136.37

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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.