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Finding the Fourth Proportional to 19,221.80, 28,832.70 and 14,847.80

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Solution

The fourth proportional to 19,221.80, 28,832.70 and 14,847.80 is: 22,271.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,221.80 : 28,832.70 = 14,847.80 : x
  2. Step 2: Convert to fraction form
    19,221.80/28,832.70 = 14,847.80/x
  3. Step 3: Cross multiply
    19,221.80x = 28,832.70 × 14,847.80
  4. Step 4: Simplify right side
    19,221.80x = 428,102,163.06
  5. Step 5: Solve for x
    x = 428,102,163.06/19,221.80
  6. Step 6: Final answer
    x = 22,271.70

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Similar ratio
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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.