Home / 20,645.04-28,490.88-11,692.80

Finding the Fourth Proportional to 20,645.04, 28,490.88 and 11,692.80

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Solution

The fourth proportional to 20,645.04, 28,490.88 and 11,692.80 is: 16,136.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.04 : 28,490.88 = 11,692.80 : x
  2. Step 2: Convert to fraction form
    20,645.04/28,490.88 = 11,692.80/x
  3. Step 3: Cross multiply
    20,645.04x = 28,490.88 × 11,692.80
  4. Step 4: Simplify right side
    20,645.04x = 333,138,161.66
  5. Step 5: Solve for x
    x = 333,138,161.66/20,645.04
  6. Step 6: Final answer
    x = 16,136.47

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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.