Home / 20,643.45-28,489.72-11,692.55

Finding the Fourth Proportional to 20,643.45, 28,489.72 and 11,692.55

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Solution

The fourth proportional to 20,643.45, 28,489.72 and 11,692.55 is: 16,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.45 : 28,489.72 = 11,692.55 : x
  2. Step 2: Convert to fraction form
    20,643.45/28,489.72 = 11,692.55/x
  3. Step 3: Cross multiply
    20,643.45x = 28,489.72 × 11,692.55
  4. Step 4: Simplify right side
    20,643.45x = 333,117,475.59
  5. Step 5: Solve for x
    x = 333,117,475.59/20,643.45
  6. Step 6: Final answer
    x = 16,136.72

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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.