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Finding the Fourth Proportional to 21,622.80, 32,362.20 and 15,682.80

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Solution

The fourth proportional to 21,622.80, 32,362.20 and 15,682.80 is: 23,471.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.80 : 32,362.20 = 15,682.80 : x
  2. Step 2: Convert to fraction form
    21,622.80/32,362.20 = 15,682.80/x
  3. Step 3: Cross multiply
    21,622.80x = 32,362.20 × 15,682.80
  4. Step 4: Simplify right side
    21,622.80x = 507,529,910.16
  5. Step 5: Solve for x
    x = 507,529,910.16/21,622.80
  6. Step 6: Final answer
    x = 23,471.98

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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.